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 A342277 #13 Mar 14 2021 20:36:01 %S A342277 3,5,2,0,8,12,-4,-12,4,16,14,0,6,20,-16,-36,-4,16,14,4,16,40,16,-36, %T A342277 -26,28,44,6,4,28,-48,-86,-20,16,14,4,16,40,16,-32,-16,40,60,28,12,52, %U A342277 8,-108,-90,12,44,22,36,96,72,-64,-96,28,104,26,-6,28,-122,-188,-52,16,14,4,16,40,16,-32 %N A342277 First differences of A342273. %C A342277 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. %H A342277 N. J. A. Sloane, <a href="/A342277/b342277.txt">Table of n, a(n) for n = 0..254</a> %Y A342277 Cf. A151723, A342273. %K A342277 sign %O A342277 0,1 %A A342277 _N. J. A. Sloane_, Mar 14 2021