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Search: id:A132732
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| 1, 2, 4, 10, 24, 54, 116, 242, 496, 1006, 2028, 4074, 8168, 16358, 32740, 65506, 131040, 262110, 524252, 1048538, 2097112, 4194262, 8388564, 16777170, 33554384, 67108814, 134217676, 268435402, 536870856, 1073741766, 2147483588
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OFFSET
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0,2
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FORMULA
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Binomial transform of [1, 1, 1, 3, 1, 3, 1, 3, 1,...].
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EXAMPLE
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a(3) = 10 = sum of row 3 terms of triangle A132731: (1 + 4 + 4 + 1).
a(3) = 10 = (1, 3, 3, 1) dot (1, 1, 1, 3) = (1 + 3 + 3 + 3).
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MATHEMATICA
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lst={1}; s=2; Do[s+=s+n; AppendTo[lst, s], {n, -2, 5!, 2}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 18 2008]
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CROSSREFS
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Cf. A132731.
Sequence in context: A136427 A018114 A089484 this_sequence A095214 A002525 A159328
Adjacent sequences: A132729 A132730 A132731 this_sequence A132733 A132734 A132735
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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), Aug 26 2007
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EXTENSIONS
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More terms and Mathematica formula from Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 18 2008
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