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 A225322 #17 Nov 24 2021 04:11:17 %S A225322 1,9,25,49,169,289,361,529,729,841,961,1369,2187,2209,3481,3721,5041, %T A225322 7921,9409,10609,24649,29791,32041,32761,36481,50653,52441,66049, %U A225322 73441,83521,113569,121801,128881,130321,167281,175561,185761,226981,292681,300763,323761 %N A225322 Lucky numbers that are prime powers. %C A225322 Intersection of A025475 and A000959. %C A225322 Conjecture: the sequence is infinite. %H A225322 Kevin P. Thompson, <a href="/A225322/b225322.txt">Table of n, a(n) for n = 1..1577</a> (terms < 10^10 with terms 1..628 from Donovan Johnson) %Y A225322 Cf. A000959, A025475. %Y A225322 Cf. A031157, A031162, A057589, A118565, A128511. %K A225322 nonn %O A225322 1,2 %A A225322 _Alex Ratushnyak_, May 05 2013