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 A342272 #23 Mar 14 2021 20:35:12 %S A342272 0,1,2,4,4,4,8,12,8,4,8,14,18,16,20,28,16,4,8,14,18,18,26,42,42,24,20, %T A342272 36,50,46,50,62,32,4,8,14,18,18,26,42,42,26,26,46,66,70,74,98,90,40, %U A342272 20,36,50,54,70,110,126,86,58,86,124,118,118,132 %N A342272 The rows of the triangle A170899 converge to this sequence. %C A342272 It would be nice to have a formula or recurrence for any of A170899, A342272-A342278, or any nontrivial relation between them. This might help to understand the fractal structure of the mysterious hexagonal Ulam-Warburton cellular automaton A151723. %C A342272 A342273 is the limiting sequence for the part of the row of A170899 that start at the first "3". %C A342272 Needs a bigger b-file. %H A342272 N. J. A. Sloane, <a href="/A342272/b342272.txt">Table of n, a(n) for n = 0..512</a> %Y A342272 Cf. A151723, A151724, A170899, A342273, A342274. %Y A342272 This is A169787 with 1 subtracted from each term. %K A342272 nonn %O A342272 0,3 %A A342272 _N. J. A. Sloane_, Mar 13 2021