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A160731
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First differences of A160730.
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3
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2, 2, 4, 6, 6, 6, 12, 14, 12, 6, 12, 14, 16, 18, 32, 34, 20, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 36, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 40, 18, 32, 38, 44, 62
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
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FORMULA
| Contribution from Nathaniel Johnston, Mar 28 2011 (Start):
a(n) = 2*A168113(n)
a(2^(n+2) + 1) = 4(2^n + 1), n >= 1.
(End)
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EXAMPLE
| Placing the entries starting from a(4) in a triangle with rows that have length equal to powers of two gives:
6, 6
6, 12, 14, 12
6, 12, 14, 16, 18, 32, 34, 20
6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 36
...
The rows of this triangle tend to 2*A168114.
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CROSSREFS
| Cf. A139250, A139251, A160730, A160733, A160737, A160739, A160741.
Sequence in context: A045999 A075569 A062722 * A098214 A178883 A109832
Adjacent sequences: A160728 A160729 A160730 * A160732 A160733 A160734
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KEYWORD
| nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), May 25 2009
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EXTENSIONS
| Terms after a(11) from Nathaniel Johnston (nathaniel(AT)nathanieljohnston.com), Mar 28 2011
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