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Search: id:A062272
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| A062272 |
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Boustrophedon transform of (n+1) mod 2. |
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+0
7
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| 1, 1, 2, 5, 12, 41, 152, 685, 3472, 19921, 126752, 887765, 6781632, 56126201, 500231552, 4776869245, 48656756992, 526589630881, 6034272215552, 72989204937125, 929327412759552, 12424192360405961, 174008703107274752
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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Index entries for sequences related to boustrophedon transform
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FORMULA
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E.g.f.: (sec(x)+tan(x))cosh(x); a(n)=(A000667(n)+A062162(n))/2. - Paul Barry (pbarry(AT)wit.ie), Jan 21 2005
a(n) = Sum{k, k>=0} binomial(n, 2k)*A000111(n-2k) . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Aug 28 2005
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CROSSREFS
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A000734 (binomial transform), a(2n+1)= A003719(n), a(2n)= A000795(n), cf. A062161 (n mod 2).
Sequence in context: A140440 A005664 A009739 this_sequence A127137 A071787 A067578
Adjacent sequences: A062269 A062270 A062271 this_sequence A062273 A062274 A062275
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KEYWORD
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nonn,easy
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AUTHOR
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Frank.Ellermann(AT)t-online.de, Jun 16 2001
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