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Search: id:A153007
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| 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; listen)
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OFFSET
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0,6
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LINKS
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OEIS (Plot 2), Triangular numbers (A000217) and toothpick numbers (A153006) vs n [From Omar E. Pol (info(AT)polprimos.com), Apr 29 2009]
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FORMULA
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a(n) = A000217(n)-A153006(n).
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MAPLE
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A000127 := proc(n) n*(n+1)/2; end: read("transforms3") ; L := BFILETOLIST("b153006.txt") ; for n from 0 to 120 do printf("%d, ", A000127(n)-op(n+1, L)) ; od: [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 13 2009]
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CROSSREFS
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Cf. A000217, A000225, A000396, A000668, A006516, A139250, A139251, A152980, A153006.
Sequence in context: A105546 A059297 A077874 this_sequence A090683 A117652 A161552
Adjacent sequences: A153004 A153005 A153006 this_sequence A153008 A153009 A153010
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Dec 19 2008, May 27 2009
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jul 13 2009
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