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 A256409 #21 Jun 16 2017 02:53:39 %S A256409 1,2,4,8,12,16,21,24,29,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54, %T A256409 55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,81,93,102,111,114,163, %U A256409 171,198,199,259,281,292,302,426,433,451,533,550,585,586,617,747 %N A256409 a(n) = index of A256408(n) in A166133. %C A256409 Created in order to try to understand the growth-rate of A256405 (and A166133). See the "blog" file in A166133. %C A256409 Where records occur in A256405. - _Ray Chandler_, Apr 06 2015 %H A256409 N. J. A. Sloane and John Mason, <a href="/A256409/b256409.txt">Table of n, a(n) for n = 1..199</a> [Terms 1 through 86 were computed by N. J. A. Sloane; terms 87 through 199 by John Mason, Apr 05 2015] %Y A256409 Cf. A166133, A256405, A256408. %K A256409 nonn %O A256409 1,2 %A A256409 _N. J. A. Sloane_, Apr 03 2015, following a suggestion from _Ray Chandler_