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Search: id:A110140
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| A110140 |
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Binomial transform of (n^n with interpolated zeros). |
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+0
1
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| 1, 1, 2, 4, 11, 31, 103, 351, 1321, 5113, 21201, 90465, 406621, 1879021, 9051309, 44754061, 229059633, 1201271409, 6488957521, 35853950609, 203303964341, 1177299817093, 6976709899853, 42161309544541, 260154190137865
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Binomial transform of 1,0,1,0,4,0,27,....
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FORMULA
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a(n)=sum{k=0..n, C(n, k)(k/2)^(k/2)*(1+(-1)^k)/2}
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CROSSREFS
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Adjacent sequences: A110137 A110138 A110139 this_sequence A110141 A110142 A110143
Sequence in context: A119020 A073191 A004251 this_sequence A115625 A056323 A081557
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Jul 13 2005
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