cp's OEIS Frontend

A356317 Numbers k such that k does not divide the least j >= k for which k and A276086(j) are coprime, where A276086 is the primorial base exp-function.

%I A356317 #6 Nov 04 2022 11:26:56
%S A356317 9,20,21,25,27,33,39,40,45,49,50,51,55,56,57,63,69,75,80,81,84,85,87,
%T A356317 91,93,98,99,100,110,111,112,115,117,119,123,126,129,130,133,135,140,
%U A356317 141,145,147,153,159,160,161,165,168,170,171,175,177,182,183,189,190,195,196,200,201,203,205,207,213,219,220,225
%N A356317 Numbers k such that k does not divide the least j >= k for which k and A276086(j) are coprime, where A276086 is the primorial base exp-function.
%C A356317 Numbers k such that k does not divide A356309(k).
%H A356317 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a>
%o A356317 (PARI) isA356317(n) = !A356315(n);
%Y A356317 Subsequence of A324584.
%Y A356317 Positions of 0's in A356315.
%Y A356317 Cf. A276086, A356309, A356316 (complement), A356319 (subsequence).
%K A356317 nonn
%O A356317 1,1
%A A356317 _Antti Karttunen_, Nov 04 2022