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Search: id:A099251
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| 1, 1, 3, 15, 91, 603, 4213, 30537, 227475, 1730787, 13393689, 105089229, 834086421, 6684761125, 54022715451, 439742222071, 3602118427251, 29671013856627, 245613376802185, 2042162142208813, 17047255430494497, 142816973618414817
(list; graph; listen)
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OFFSET
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0,3
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MAPLE
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G:=(1+x-sqrt(1-2*x-3*x^2))/(2*x*(1+x)): Gser:=series(G, x=0, 60):1, seq(coeff(Gser, x^(2*n)), n=1..25); (Deutsch)
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CROSSREFS
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Sequence in context: A034954 A077783 A047019 this_sequence A006632 A159928 A020018
Adjacent sequences: A099248 A099249 A099250 this_sequence A099252 A099253 A099254
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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 16 2004
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Nov 18 2004
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