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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 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 October 24 01:20 EDT 2018. Contains 316541 sequences. (Running on oeis4.)