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A342275 First differences of A170899. 1
0, 1, -1, 1, 1, 1, -3, 1, 1, 2, 0, -1, 3, 1, -7, 1, 1, 2, 0, 0, 4, 4, -4, -5, 3, 5, 2, -4, 6, 0, -15, 1, 1, 2, 0, 0, 4, 4, -4, -4, 4, 6, 4, -2, 4, 8, -12, -13, 3, 5, 2, 0, 8, 12, -4, -16, 2, 12, 7, -10, 10, -3, -31, 1, 1, 2, 0, 0, 4, 4, -4, -4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,7
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
CROSSREFS
Sequence in context: A297557 A066827 A016467 * A324049 A194510 A331311
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Mar 14 2021
STATUS
approved

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Last modified August 29 15:03 EDT 2024. Contains 375517 sequences. (Running on oeis4.)