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A151724 First differences of A151723. 16
0, 1, 6, 6, 18, 6, 18, 30, 42, 6, 18, 30, 54, 54, 42, 78, 90, 6, 18, 30, 54, 54, 54, 102, 150, 102, 42, 78, 138, 162, 114, 186, 186, 6, 18, 30, 54, 54, 54, 102, 150, 102, 54, 102, 174, 222, 198, 246, 342, 198, 42, 78, 138, 162, 162, 258, 402, 354, 162, 186 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

S. M. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215-224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962 (see Example 6, page 224).

LINKS

David Applegate and N. J. A. Sloane, Table of n, a(n) for n = 0..1025

David Applegate, The movie version

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata

David Applegate and N. J. A. Sloane, Table of n, A151724(n), A151723(n) for n = 0..1025

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

EXAMPLE

When written as a triangle:

0,

1,

6,

6,18,

6,18,30,42,

6,18,30,54,54,42,78,90,

6,18,30,54,54,54,102,150,102,42,78,138,162,114,186,186,

...

Right border gives 0 together with A068293. - Omar E. Pol, Mar 19 2015

CROSSREFS

Cf. A151723, A170898 (after dividing by 6), A170899, A169759.

Sequence in context: A175561 A168460 A038518 * A298026 A000976 A161787

Adjacent sequences:  A151721 A151722 A151723 * A151725 A151726 A151727

KEYWORD

nonn

AUTHOR

David Applegate and N. J. A. Sloane, Jun 13 2009

STATUS

approved

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Last modified February 23 21:23 EST 2018. Contains 299588 sequences. (Running on oeis4.)