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 A344953 #8 Jul 09 2021 21:36:35 %S A344953 2,4,7,8,12,13,14,20,21,22,23,24,33,34,35,36,37,38,39,40,54,55,56,57, %T A344953 58,59,60,61,62,63,64,65,66,88,89,90,91,92,93,94,95,96,97,98,99,100, %U A344953 101,102,103,104,105,106,107,108,143,144,145,146,147,148,149 %N A344953 Positions of words in A341258 that end with 1. %e A344953 The first twenty words w(n): 0, 1, 00, 01, 10, 000, 11, 001, 010, 100, 0000, 011, 101, 0001, 110, 0010, 0100, 1000, 00000, 111; so a(2) = 4. %t A344953 (See A341258.) %Y A344953 Cf. A341258, A342910, A344950, A344951. %Y A344953 Complement of A133512. %Y A344953 See A341258 for a guide to related sequences. %K A344953 nonn,base %O A344953 1,1 %A A344953 _Clark Kimberling_, Jun 12 2021