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A151922
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Number of first-quadrant cells (including the two boundaries) that are "ON" after n-th stage of the Holladay-Ulam cellular automaton.
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3
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1, 3, 5, 9, 11, 15, 19, 29, 31, 35, 39, 49, 53, 63, 73, 101, 103, 107, 111, 121, 125, 135, 145, 173, 177, 187, 197, 225, 235, 263, 291, 373, 375, 379, 383, 393, 397, 407, 417, 445, 449, 459, 469, 497, 507, 535, 563, 645
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| See A079314, the first differences and A147562, the main entry for this CA, for further information.
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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
Index entries for sequences related to cellular automata
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FORMULA
| a(n) = A079316(2n).
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CROSSREFS
| Cf. A079314, A079316, A139250, A147562, A160406.
Sequence in context: A002731 A006046 A161830 * A104635 A199407 A169780
Adjacent sequences: A151919 A151920 A151921 * A151923 A151924 A151925
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KEYWORD
| nonn,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 05 2009
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EXTENSIONS
| Extended (a(30)-a(47)) and edited by Omar E. Pol (info(AT)polprimos.com), Nov 21 2010
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