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Search: id:A101487
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| A101487 |
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G.f. satisfies A(x) = x*(1+4A+A^2)^2/(1+A+A^2). |
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+0
2
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| 0, 1, 7, 59, 544, 5289, 53256, 549771, 5782105, 61698314, 666014200, 7257758425, 79716116408, 881431795012, 9802065031740, 109547572895811, 1229634981583560, 13855340183096319, 156654090794892216
(list; graph; listen)
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OFFSET
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0,3
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LINKS
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M. Bousquet-Melou, Limit laws for embedded trees
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MAPLE
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A:= proc(n) option remember; if n=0 then 0 else convert (series (x* (1+ 4*A(n-1) +A(n-1)^2)^2/ (1+A(n-1) +A(n-1)^2), x, n+1), polynom) fi end: a:= n-> coeff (A(n), x, n): seq (a(n), n=0..18); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 23 2008]
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CROSSREFS
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Sequence in context: A142511 A059705 A015568 this_sequence A099659 A135150 A077409
Adjacent sequences: A101484 A101485 A101486 this_sequence A101488 A101489 A101490
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KEYWORD
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nonn
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AUTHOR
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Ralf Stephan, Jan 21 2005
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