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A153007 Triangular number A000217(n) minus toothpick number A153006(n). 6
0, 0, 0, 0, 1, 2, 1, 0, 3, 8, 11, 13, 15, 13, 5, 0, 7, 20, 31, 41, 51, 57, 57, 59, 69, 79, 82, 81, 74, 51, 17, 0, 15, 44, 71, 97, 123, 145, 161, 179, 205, 231, 250, 265, 274, 267, 249, 247, 273, 307, 334, 357, 374, 375, 364, 363, 376, 380, 364, 332, 270, 163, 49, 0, 31, 92, 151 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,6

LINKS

Table of n, a(n) for n=0..66.

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

OEIS (Plot 2), Triangular numbers (A000217) and toothpick numbers (A153006) vs n [From Omar E. Pol, Apr 29 2009]

FORMULA

a(n) = A000217(n)-A153006(n).

CROSSREFS

Cf. A000217, A000225, A000396, A000668, A006516, A139250, A139251, A152980, A153006.

Sequence in context: A244117 A263426 A278882 * A090683 A161552 A095859

Adjacent sequences:  A153004 A153005 A153006 * A153008 A153009 A153010

KEYWORD

nonn

AUTHOR

Omar E. Pol, Dec 19 2008, May 27 2009

EXTENSIONS

More terms from R. J. Mathar, Jul 13 2009

STATUS

approved

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Last modified February 21 15:58 EST 2018. Contains 299414 sequences. (Running on oeis4.)