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Search: id:A145654
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| 0, 2, 8, 22, 52, 114, 240, 494, 1004, 2026, 4072, 8166, 16356, 32738, 65504, 131038, 262108, 524250, 1048536, 2097110, 4194260, 8388562, 16777168, 33554382, 67108812, 134217674, 268435400, 536870854, 1073741764, 2147483586
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OFFSET
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1,2
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COMMENT
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In a C/C++ notation, the updates from a(n-1) to a(n) can be written as a+=(a+=n), starting from a(1)=0.
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FORMULA
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a(n) = sum_{i=1..n} A000918(i). a(n+1)-a(n)=A000918(n+1).
a(n) = A005803(n+1). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 21 2008
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MATHEMATICA
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lst={}; s=0; Do[s+=(s+=n); AppendTo[lst, s], {n, 0, 5!}]; lst
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CROSSREFS
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Cf. A000918.
Sequence in context: A094939 A006732 A005803 this_sequence A074352 A017928 A102880
Adjacent sequences: A145651 A145652 A145653 this_sequence A145655 A145656 A145657
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KEYWORD
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nonn
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AUTHOR
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Vladimir Orlovsky (4vladimir(AT)gmail.com), Oct 16 2008
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EXTENSIONS
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Edited by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 21 2008
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