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Search: id:A133939
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| A133939 |
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E.g.f. satisfies: A(x) = x*(tan(tan(A(x)))+1). |
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+0
1
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| 0, 1, 2, 6, 40, 440, 5952, 97104, 1888640, 42480000, 1082119680, 30814080000, 970187827200, 33461288899584, 1254539018571776, 50803163905751040, 2209862882578300928, 102761280728930287616, 5087062588875762696192
(list; graph; listen)
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OFFSET
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0,3
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MAPLE
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A:= proc(n) option remember; if n=0 then 0 else convert (series (x* (tan (tan(A(n-1)))+1), x=0, n+1), polynom) fi end: a:= n-> coeff (A(n), x, n)*n!: seq (a(n), n=0..23);
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CROSSREFS
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Sequence in context: A098852 A120592 A081471 this_sequence A045846 A135755 A051185
Adjacent sequences: A133936 A133937 A133938 this_sequence A133940 A133941 A133942
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KEYWORD
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nonn
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AUTHOR
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Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 27 2008
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