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A291275 Primes p such that p does not divide any term of the Apéry-like sequence A005258. 24

%I #13 Jan 13 2020 09:35:03

%S 2,5,13,17,29,37,41,61,73,89,101,109,137,149,173,181,197,229,233,269,

%T 277,313,337,349,353,373,397,401,409,433,457,461,541,557,601,613,641,

%U 661,673,677,701,709,733,761,769,797,821,829,853,857,877,929,941,977

%N Primes p such that p does not divide any term of the Apéry-like sequence A005258.

%H Amita Malik and Armin Straub, <a href="/A133370/a133370.nb">Mathematica notebook for generating A133370 and A260793, A291275-A291284</a>

%H Amita Malik and Armin Straub, <a href="/A133370/a133370.pdf">Lists of all primes up to 10000 in A133370 and A260793, A291275-A291284, together with Mathematica code.</a>

%H Amita Malik and Armin Straub, <a href="https://doi.org/10.1007/s40993-016-0036-8">Divisibility properties of sporadic Apéry-like numbers</a>, Research in Number Theory, 2016, 2:5.

%t maxPrime = 977;

%t maxPi = PrimePi @ maxPrime;

%t okQ[p_] := AllTrue[Range[3 maxPi (* coeff 3 is empirical *)], GCD[HypergeometricPFQ[{# + 1, -#, -#}, {1, 1}, 1], p] == 1&];

%t Select[Prime[Range[maxPi]], okQ] (* _Jean-François Alcover_, Jan 13 2020 *)

%Y For primes that do not divide the terms of the sequences A000172, A005258, A002893, A081085, A006077, A093388, A125143, A229111, A002895, A290575, A290576, A005259 see A260793, A291275-A291284 and A133370 respectively.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Aug 21 2017

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)