A342276 First differences of A342272.

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, -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, 16, 40, 16, -40, -28, 28, 38, -6, 0, 14, -68, -60, 4, 6, 4

Offset: 0

Author

N. J. A. Sloane, Mar 14 2021

Keywords

• sign

Comments

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.

Links

• N. J. A. Sloane, Table of n, a(n) for n = 0..511

Crossrefs

Cf. A151723, A342272.