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 A342278 #13 Mar 14 2021 20:36:07 %S A342278 4,6,4,0,8,16,0,-16,0,20,20,4,4,24,-8,-48,-16,20,20,8,16,48,32,-36, %T A342278 -44,24,60,20,0,32,-36,-116,-48,20,20,8,16,48,32,-32,-32,40,80,48,16, %U A342278 56,32,-116,-140,-8,60,36,40,112,112,-48,-136,0,132,64,-12,28,-108,-256,-112,20,20,8,16,48,32 %N A342278 First differences of A342274. %C A342278 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 A342278 N. J. A. Sloane, <a href="/A342278/b342278.txt">Table of n, a(n) for n = 0..254</a> %Y A342278 Cf. A151723, A342274. %K A342278 sign %O A342278 0,1 %A A342278 _N. J. A. Sloane_, Mar 14 2021