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 A057334 #13 Nov 03 2024 19:46:29 %S A057334 1,2,2,3,2,3,3,5,2,3,3,5,3,5,5,7,2,3,3,5,3,5,5,7,3,5,5,7,5,7,7,11,2,3, %T A057334 3,5,3,5,5,7,3,5,5,7,5,7,7,11,3,5,5,7,5,7,7,11,5,7,7,11,7,11,11,13,2, %U A057334 3,3,5,3,5,5,7,3,5,5,7,5,7,7,11,3,5,5,7 %N A057334 In A000120, replace each entry k with the k-th prime and replace 0 with 1. %H A057334 Michael Gilleland, <a href="/selfsimilar.html">Some Self-Similar Integer Sequences</a> %F A057334 a(n) = A000040(A000120(n)) for n>0. %F A057334 a(n) = A008578(1 + A000120(n)). - _Alois P. Heinz_, Nov 03 2024 %o A057334 (PARI) a(n) = if (n==0, 1, prime(hammingweight(n))); \\ _Michel Marcus_, Feb 08 2014 %Y A057334 Cf. A000040, A000120, A008578, A055932, A057335. %K A057334 easy,nonn %O A057334 0,2 %A A057334 _Alford Arnold_, Aug 27 2000 %E A057334 More terms from _Michel Marcus_, Feb 08 2014