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Search: id:A005317
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| A005317 |
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(2^n + C(2n,n))/2.
(Formerly M1460)
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+0
2
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| 1, 2, 5, 14, 43, 142, 494, 1780, 6563, 24566, 92890, 353740, 1354126, 5204396, 20066492, 77575144, 300572963, 1166868646, 4537698722, 17672894044, 68923788698, 269129985796, 1052051579012, 4116719558104, 16123810230158, 63205319996092, 247959300028484
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Hankel transform is A008619. - Paul Barry (pbarry(AT)wit.ie), Nov 13 2007
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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MAPLE
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f := n->(2^n+binomial(2*n, n))/2;
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CROSSREFS
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Sequence in context: A066351 A029889 A123020 this_sequence A126566 A112808 A088927
Adjacent sequences: A005314 A005315 A005316 this_sequence A005318 A005319 A005320
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com) and Peter Fishburn.
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