

A161832


a(n) = (A161830(n+1)1)/2.


3



0, 1, 2, 4, 5, 7, 9, 13, 15, 17, 19, 23, 26, 30, 35, 44, 49, 51
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OFFSET

0,3


COMMENTS

The sequence gives the number of Ytoothpicks in the structure after n rounds. A161833 (the first differences) gives the number added at the nth round.
See the Ytoothpick sequence A160120 and A161830 for more information.


LINKS

Table of n, a(n) for n=0..17.
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


CROSSREFS

Cf. A139250, A160120, A160406, A161830, A161831, A161833.
Sequence in context: A249058 A105771 A193494 * A078404 A056908 A296344
Adjacent sequences: A161829 A161830 A161831 * A161833 A161834 A161835


KEYWORD

more,nonn


AUTHOR

Omar E. Pol, Jun 20 2009


STATUS

approved



