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Search: id:A139756
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| 0, 0, 1, 4, 12, 32, 80, 192, 448, 1024, 2304, 5120, 11264, 24576, 53248, 114688, 245760, 524288, 1114112, 2359296, 4980736, 10485760, 22020096, 46137344, 96468992, 201326592, 419430400, 872415232, 1811939328, 3758096384
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OFFSET
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0,4
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COMMENT
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Also: self-convolution of A131577. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
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FORMULA
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O.g.f.: x^2/(2x-1)^2. a(n)=(n-1)*2^n/4 if n>0. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
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MAPLE
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with(finance):seq(add(futurevalue( 2, 1, n), k=0..n)/2, n=-2..27); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jun 20 2008
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CROSSREFS
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Adjacent sequences: A139753 A139754 A139755 this_sequence A139757 A139758 A139759
Sequence in context: A090634 A085750 A097067 this_sequence A001787 A118442 A038592
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), May 19 2008
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 22 2008
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