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A342272 The rows of the triangle A170899 converge to this sequence. 9
0, 1, 2, 4, 4, 4, 8, 12, 8, 4, 8, 14, 18, 16, 20, 28, 16, 4, 8, 14, 18, 18, 26, 42, 42, 24, 20, 36, 50, 46, 50, 62, 32, 4, 8, 14, 18, 18, 26, 42, 42, 26, 26, 46, 66, 70, 74, 98, 90, 40, 20, 36, 50, 54, 70, 110, 126, 86, 58, 86, 124, 118, 118, 132 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

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.

A342273 is the limiting sequence for the part of the row of A170899 that start at the first "3".

Needs a bigger b-file.

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 0..512

CROSSREFS

Cf. A151723, A151724, A170899, A342273, A342274.

This is A169787 with 1 subtracted from each term.

Sequence in context: A220525 A160809 A139251 * A182635 A188346 A309690

Adjacent sequences:  A342269 A342270 A342271 * A342273 A342274 A342275

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 13 2021

STATUS

approved

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Last modified September 19 17:19 EDT 2021. Contains 347564 sequences. (Running on oeis4.)