This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A268391 #9 Feb 11 2016 12:08:39 %S A268391 2,3,5,7,8,11,13,17,19,23,27,29,31,32,37,41,43,47,53,59,61,67,71,73, %T A268391 79,83,89,97,101,103,107,109,113,125,127,131,137,139,149,151,157,163, %U A268391 167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,243,251,257,263,269,271,277,281,283,293,307,311,313 %N A268391 Numbers of the form p^A001317(k) where p is prime and k >= 0. %C A268391 Sequence A268392 sorted into ascending order. %H A268391 Antti Karttunen, <a href="/A268391/b268391.txt">Table of n, a(n) for n = 1..10000</a> %o A268391 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A268391 (define A268391 (MATCHING-POS 1 1 (lambda (n) (and (= 1 (A001221 n)) (= 1 (A268384 (A067029 n))))))) %Y A268391 Cf. A001221, A001317, A050376, A067029, A268384, A268392. %Y A268391 Cf. A000040 (subsequence). %Y A268391 Subsequence of A000961 and A246551. %Y A268391 Differs from A171561 and A246551 for the first time at n=36, which here a(36) = 131. %K A268391 nonn %O A268391 1,1 %A A268391 _Antti Karttunen_, Feb 10 2016