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Revisions by Muniru A Asiru

(See also Muniru A Asiru's wiki page)

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A032474

Numbers k such that 195*2^k+1 is prime.
(history; published version)

#29 by Muniru A Asiru at Mon Apr 29 18:19:38 EDT 2019

STATUS

editing

proposed

A032471

Numbers k such that 189*2^k+1 is prime.
(history; published version)

#28 by Muniru A Asiru at Mon Apr 29 18:10:36 EDT 2019

STATUS

editing

proposed

A032474

Numbers k such that 195*2^k+1 is prime.
(history; published version)

#27 by Muniru A Asiru at Mon Apr 29 17:48:49 EDT 2019

STATUS

editing

proposed

Discussion

Mon Apr 29

17:52

Alois P. Heinz: ... and the subsequence of multiples of 5 starts 20, 70, 80, 110, 125, 140, 170, 230, 365, 860, 1045, 1270, 59260, 71590, 240110, 422195, 478255, ... this is easy to check.  But why should this be valid a comment?  I cannot see any reason.

#26 by Muniru A Asiru at Mon Apr 29 17:48:40 EDT 2019

COMMENTS

The subsequence of prime values starts 13, 31, 179, 1861, 3623, 55763, 196303, ... - Muniru A Asiru, Apr 29 2019

STATUS

approved

editing

A098258

Chebyshev polynomials S(n,531) + S(n-1,531) with Diophantine property.
(history; published version)

#22 by Muniru A Asiru at Mon Apr 29 17:42:58 EDT 2019

STATUS

editing

proposed

#21 by Muniru A Asiru at Mon Apr 29 17:42:49 EDT 2019

LINKS

Muniru A Asiru, <a href="/A098258/b098258.txt">Table of n, a(n) for n = 0..300</a>

PROG

(GAP) a:=[1, 532];; for n in [3..12] do a[n]:=531*a[n-1]-a[n-2]; od; Print(a); # Muniru A Asiru, Apr 29 2019

STATUS

proposed

editing

A023516

Number of distinct prime divisors of prime(n)*prime(n-1) - 1.
(history; published version)

#17 by Muniru A Asiru at Mon Apr 29 16:40:44 EDT 2019

STATUS

editing

proposed

#16 by Muniru A Asiru at Mon Apr 29 16:40:28 EDT 2019

MAPLE

0, seq(nops(numtheory:-factorset(ithprime(n)*ithprime(n-1)-1)), n=2..120); # Muniru A Asiru, Apr 29 2019

STATUS

approved

editing

A032424

Numbers k such that 149*2^k+1 is prime.
(history; published version)

#35 by Muniru A Asiru at Mon Apr 29 16:39:22 EDT 2019

STATUS

editing

proposed

#34 by Muniru A Asiru at Mon Apr 29 16:39:17 EDT 2019

COMMENTS

The subsequence of prime values starts 3, 7, 17, 127, 137, 191, 827, 22783, 714199, ... - Muniru A Asiru, Apr 29 2019

STATUS

approved

editing