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Search: id:A087448
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| A087448 |
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3^(n-1)(n+3)/2-(n-1)/2. |
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+0
2
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| 1, 2, 7, 26, 93, 322, 1091, 3642, 12025, 39362, 127935, 413338, 1328597, 4251522, 13551739, 43046714, 136314609, 430467202, 1355971703, 4261625370, 13366006861, 41841412802, 130754415027, 407953774906, 1270932914153
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Binomial transform of A087447. Second binomial transform of 1,0,3,0,5,0,7,... (A005408).
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CROSSREFS
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Adjacent sequences: A087445 A087446 A087447 this_sequence A087449 A087450 A087451
Sequence in context: A000697 A027417 A134063 this_sequence A129273 A055988 A087096
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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), Sep 05 2003
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