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 A229218 #9 Nov 10 2024 13:48:44
%S A229218 0,2,6,10,17,34,45,65,81,118,3,1,5,11,18,33,46,64,80,117,7,26,9,41,23,
%T A229218 35,44,66,82,119,14,12,42,16,54,38,51,69,85,122,21,19,24,55,145,152,
%U A229218 197,230,271,362,179,155,36,39,153,146,185,533
%N A229218 Position of n in A228407.
%C A229218 The inverse sequence to A228407.
%e A229218 a(0) = 0 since A228407(0) is 0;
%e A229218 a(1) = 2 since A228407(2) is 1;
%e A229218 a(2) = 6 since A228407(6) is 2;
%e A229218 a(11) = 1 since A228407(1) is 11; etc.
%t A229218 (* do A228407 first, then *) lst = Array[a, 500, 0]; Flatten[ Table[ Position[lst, n], {n, 0, 57}] - 1]
%Y A229218 Cf. A228407.
%K A229218 nonn
%O A229218 0,2
%A A229218 _Robert G. Wilson v_, Nov 10 2013