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Search: id:A131352
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| 1, 2, 6, 14, 32, 72, 160, 352, 768, 1664, 3584, 7680, 16384, 34816, 73728, 155648, 327680, 688128, 1441792, 3014656, 6291456, 13107200, 27262976, 56623104, 117440512, 243269632, 503316480, 1040187392, 2147483648, 4429185024
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OFFSET
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0,2
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FORMULA
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Binomial transform of A093178: (1, 1, 3, 1, 5, 1, 7, 1...)
a(n)=A129954(n), n>1. G.f.: (1-2x+2x^2-2x^3)/(1-2x)^2. [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 13 2008]
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EXAMPLE
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a(3) = 14 = sum of row 3 terms of triangle A133935: (1 + 3 + 9 + 1); = (1, 3, 3, 1) dot (1, 1, 3, 1).
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CROSSREFS
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Cf. A133935, A093178.
Sequence in context: A096238 A074878 A065495 this_sequence A051485 A077999 A110524
Adjacent sequences: A131349 A131350 A131351 this_sequence A131353 A131354 A131355
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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), Sep 29 2007
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EXTENSIONS
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Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 13 2008
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