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Search: id:A134393
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| 1, 3, 8, 20, 45, 91, 168, 288, 465, 715, 1056, 1508, 2093, 2835, 3760, 4896, 6273, 7923, 9880, 12180, 14861, 17963, 21528, 25600, 30225, 35451, 41328, 47908, 55245, 63395, 72416, 82368, 93313
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OFFSET
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1,2
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FORMULA
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Binomial transform of [1, 2, 3, 4, 2, 0, 0, 0,...].
O.g.f.: x(1-2x+3x^2)/(1-x)^5. a(n)=A014628(n+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 08 2008
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EXAMPLE
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a(4) = 20 = (1, 3, 3, 1) dot (1, 2, 3, 4) = (1 + 6 + 9 + 4).
a(4) = sum of row 4 terms of triangle A134392: (8 + 7 + 4 + 1).
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CROSSREFS
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Cf. A134392.
Sequence in context: A109327 A096585 A057765 this_sequence A014628 A034504 A140481
Adjacent sequences: A134390 A134391 A134392 this_sequence A134394 A134395 A134396
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KEYWORD
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nonn
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AUTHOR
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Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 23 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jun 08 2008
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