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Search: id:A099869
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| 1, 4, 23, 197, 2056, 23714, 290512, 3707852, 48760367, 656043857, 8987427467, 124936258127, 1757900019101, 24987199492705, 358268702159069, 5175497420902741, 75254198337177848, 1100534370899151722
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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a(n)=sum(binomial(2k, k)/(k+1), k=0..2n). - Emeric Deutsch (deutsch(AT)duke.poly.edu), Dec 20 2004
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MAPLE
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a:=n->sum(binomial(2*k, k)/(k+1), k=0..2*n): seq(a(n), n=0..20); (Deutsch)
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CROSSREFS
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Cf. A014137, A099975.
Cf. A000108.
Sequence in context: A056814 A058863 A108953 this_sequence A056785 A105747 A099692
Adjacent sequences: A099866 A099867 A099868 this_sequence A099870 A099871 A099872
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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), Nov 19 2004
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Dec 20 2004
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