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Revision History for A161535

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A161535

Array read by antidiagonals: Row n contains the positive multiples of the first n primes.
(history; published version)

#10 by Susanna Cuyler at Sun Feb 24 21:08:43 EST 2019

STATUS

proposed

approved

#9 by Jon E. Schoenfield at Sun Feb 24 20:28:12 EST 2019

STATUS

editing

proposed

#8 by Jon E. Schoenfield at Sun Feb 24 20:28:10 EST 2019

NAME

Array read by antidiagonals: Row n contains those the positive multiples of the first n primes.

EXAMPLE

Contribution from _From _R. J. Mathar_, Jul 04 2009: (Start)

. 2.. 4.. 6.. 8. 10. 12. 14. 16. 18. 20. 22. 24. 26. 28. 30. 32. 34. 36. 38. 40

. 2.. 3.. 4.. 6.. 8.. 9. 10. 12. 14. 15. 16. 18. 20. 21. 22. 24. 26. 27. 28. 30

. 2.. 3.. 4.. 5.. 6.. 8.. 9. 10. 12. 14. 15. 16. 18. 20. 21. 22. 24. 25. 26. 27

. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9. 10. 12. 14. 15. 16. 18. 20. 21. 22. 24. 25. 26

. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9. 10. 11. 12. 14. 15. 16. 18. 20. 21. 22. 24. 25

. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9. 10. 11. 12. 13. 14. 15. 16. 18. 20. 21. 22. 24

. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 20. 21. 22

. 2.. 3.. 4.. 5.. 6.. 7.. 8.. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21

MAPLE

T := proc(n, k) option remember; local i, a; if k = 1 then 2; else for a from procname(n, k-1) +1 do for i from 1 to n do if a mod ithprime(i) =0 then RETURN(a); fi; od: od: fi; end: for d from 1 to 15 do for k from 1 to d do printf("%d, ", T(d-k+1, k)) ; od: od: [From _# _R. J. Mathar_, Jul 04 2009]

STATUS

approved

editing

#7 by Charles R Greathouse IV at Tue Mar 11 01:32:32 EDT 2014

AUTHOR

__Leroy Quet__, , Jun 13 2009

Discussion

Tue Mar 11

01:32

OEIS Server: https://oeis.org/edit/global/2122

#6 by N. J. A. Sloane at Wed Feb 05 20:18:57 EST 2014

AUTHOR

__Leroy Quet_, _, Jun 13 2009

Discussion

Wed Feb 05

20:18

OEIS Server: https://oeis.org/edit/global/2118

#5 by N. J. A. Sloane at Wed Feb 05 20:12:02 EST 2014

AUTHOR

_Leroy Quet, _, Jun 13 2009

Discussion

Wed Feb 05

20:12

OEIS Server: https://oeis.org/edit/global/2117

#4 by Russ Cox at Fri Mar 30 17:40:00 EDT 2012

EXAMPLE

Contribution from _R. J. Mathar (mathar(AT)strw.leidenuniv.nl), _, Jul 04 2009: (Start)

MAPLE

EXTENSIONS

More terms from _R. J. Mathar (mathar(AT)strw.leidenuniv.nl), _, Jul 04 2009

Discussion

Fri Mar 30

17:40

OEIS Server: https://oeis.org/edit/global/190

#3 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

KEYWORD

nonn,tabl,new

AUTHOR

Leroy Quet (http://www.prism-of-spirals.net/), , Jun 13 2009

#2 by N. J. A. Sloane at Sun Jul 11 03:00:00 EDT 2010

KEYWORD

nonn,tabl,new

AUTHOR

Leroy Quet (q1qq2qqq3qqqq(AT)yahoohttp://www.prism-of-spirals.comnet/), Jun 13 2009

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Array read by antidiagonals: Row n contains those positive multiples of the first n primes.

DATA

2, 2, 4, 2, 3, 6, 2, 3, 4, 8, 2, 3, 4, 6, 10, 2, 3, 4, 5, 8, 12, 2, 3, 4, 5, 6, 9, 14, 2, 3, 4, 5, 6, 8, 10, 16, 2, 3, 4, 5, 6, 7, 9, 12, 18, 2, 3, 4, 5, 6, 7, 8, 10, 14, 20, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15, 22, 2, 3, 4, 5, 6, 7, 8, 9, 10, 14, 16, 24, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18, 26, 2, 3, 4, 5

OFFSET

1,1

EXAMPLE

Row 2 consists of the positive multiples of the first 2 primes (2 and 3). 2,3,4,6,8,9,10,12,14,15,16,18,20,...

Contribution from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 04 2009: (Start)

The table starts

.2..4..6..8.10.12.14.16.18.20.22.24.26.28.30.32.34.36.38.40

.2..3..4..6..8..9.10.12.14.15.16.18.20.21.22.24.26.27.28.30

.2..3..4..5..6..8..9.10.12.14.15.16.18.20.21.22.24.25.26.27

.2..3..4..5..6..7..8..9.10.12.14.15.16.18.20.21.22.24.25.26

.2..3..4..5..6..7..8..9.10.11.12.14.15.16.18.20.21.22.24.25

.2..3..4..5..6..7..8..9.10.11.12.13.14.15.16.18.20.21.22.24

.2..3..4..5..6..7..8..9.10.11.12.13.14.15.16.17.18.20.21.22

.2..3..4..5..6..7..8..9.10.11.12.13.14.15.16.17.18.19.20.21

(End)

MAPLE

KEYWORD

nonn,tabl

AUTHOR

Leroy Quet (q1qq2qqq3qqqq(AT)yahoo.com), Jun 13 2009

EXTENSIONS

More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 04 2009

STATUS

approved