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 A256219 #8 May 05 2022 14:55:39 %S A256219 2,3,4,7,8,11,14,15,18,26,29,34,38,41,42,46,56,57,61,65,69,73,80,84, %T A256219 93,96,97,101,104,108,124,128,132,136,144,145,153,160,161,169,173,177, %U A256219 185,188,192,196,204,220,221,224,225,236,237,241,253 %N A256219 Indices of prime terms in A121216. %C A256219 It would be nice to have a definition that is independent of A121216. %H A256219 Rémy Sigrist, <a href="/A256219/b256219.txt">Table of n, a(n) for n = 1..10000</a> %H A256219 Rémy Sigrist, <a href="/A256219/a256219.gp.txt">PARI program</a> %o A256219 (PARI) See Links section. %Y A256219 Cf. A121216, A256399. %K A256219 nonn %O A256219 1,1 %A A256219 _N. J. A. Sloane_, Mar 28 2015