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%I #13 Mar 14 2021 20:35:54
%S 1,1,2,0,0,4,4,-4,-4,4,6,4,-2,4,8,-12,-12,4,6,4,0,8,16,0,-18,-4,16,14,
%T -4,4,12,-30,-28,4,6,4,0,8,16,0,-16,0,20,20,4,4,24,-8,-50,-20,16,14,4,
%U 16,40,16,-40,-28,28,38,-6,0,14,-68,-60,4,6,4
%N First differences of A342272.
%C 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 N. J. A. Sloane, <a href="/A342276/b342276.txt">Table of n, a(n) for n = 0..511</a>
%Y Cf. A151723, A342272.
%K sign
%O 0,3
%A _N. J. A. Sloane_, Mar 14 2021
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