%I #13 Mar 14 2021 20:36:01

%S 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 -26,28,44,6,4,28,-48,-86,-20,16,14,4,16,40,16,-32,-16,40,60,28,12,52,

%U 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 First differences of A342273.

%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="/A342277/b342277.txt">Table of n, a(n) for n = 0..254</a>

%Y Cf. A151723, A342273.

%K sign

%O 0,1

%A _N. J. A. Sloane_, Mar 14 2021