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Revision History for A090978

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A090978

a(n) = n + Sum{a(k): 1<=k<n and a(k) divides n}.
(history; published version)

#3 by Russ Cox at Fri Mar 30 18:50:43 EDT 2012

AUTHOR

_Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), _, Feb 28 2004

Discussion

Fri Mar 30

18:50

OEIS Server: https://oeis.org/edit/global/246

#2 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

KEYWORD

nonn,new

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystemsgmail.com), Feb 28 2004

#1 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004

NAME

a(n) = n + Sum{a(k): 1<=k<n and a(k) divides n}.

DATA

1, 3, 7, 5, 11, 10, 15, 9, 22, 26, 23, 16, 14, 36, 39, 33, 18, 49, 20, 56, 32, 56, 47, 28, 31, 53, 40, 78, 30, 94, 63, 81, 81, 35, 83, 103, 38, 77, 82, 116, 42, 109, 44, 122, 78, 70, 95, 68, 106, 66, 55, 79, 107, 85, 127, 218, 61, 59, 119, 144, 123, 94, 146, 113, 71

OFFSET

1,2

EXAMPLE

a(32) = 32+(a(21)+a(12)+a(1)) = 32+32+16+1 = 81;

a(33) = 33+(a(16)+a(5)+a(2)+a(1)) = 33+33+11+3+1 = 81.

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)lhsystems.com), Feb 28 2004

STATUS

approved