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 A385455 #11 Jul 09 2025 10:17:21 %S A385455 -1,0,1,2,4,5,6,7,8,9,11,12,13,14,15,17,18,19,20,21,22,24,25,26,28,29, %T A385455 30,31,32,33,35,36,37,38,39,41,42,43,44,45,46,48,49,50,51,52,53,55,56, %U A385455 57,58,59,61,62,63,64,65,66,68,69,70,72,73,74,75,76,77,79,80,81 %N A385455 First prepended column of the tribonacci array of the second kind, A385436. %C A385455 The numbers that do not occur in this sequence are given by A278041. %H A385455 A.H.M. Smeets, <a href="/A385455/b385455.txt">Table of n, a(n) for n = 1..20000</a> %Y A385455 Cf. A278041, A385436. %K A385455 sign %O A385455 1,4 %A A385455 _A.H.M. Smeets_, Jun 29 2025