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Search: id:A001028
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| A001028 |
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E.g.f. satisfies A'(x)=1+A(A(x)), A(0)=0. |
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+0
6
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| 1, 1, 2, 7, 37, 269, 2535, 29738, 421790, 7076459, 138061343, 3089950076, 78454715107, 2238947459974, 71253947372202, 2511742808382105, 97495087989736907, 4145502184671892500, 192200099033324115855
(list; graph; listen)
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OFFSET
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1,3
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REFERENCES
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P. J. Cameron, Sequence operators from groups, Linear Alg. Applic., 226-228 (1995), 109-113.
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MAPLE
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A:= proc(n) option remember; local T; if n=0 then 0 else T:= A(n-1); unapply (convert (series (Int (1+T(T(x)), x) , x, n+1), polynom), x) fi end: a:= n-> coeff (A(n)(x), x, n)*n!: seq (a(n), n=1..19); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 23 2008]
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CROSSREFS
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Cf. A030266, A035049.
Adjacent sequences: A001025 A001026 A001027 this_sequence A001029 A001030 A001031
Sequence in context: A083659 A036247 A107877 this_sequence A116481 A102743 A036432
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KEYWORD
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nonn,eigen,nice
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AUTHOR
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Peter Cameron [ P.J.Cameron(AT)qmw.ac.uk ]
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EXTENSIONS
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More terms from Christian G. Bower (bowerc(AT)usa.net), Oct 15 1998.
Corrected by Alois P. Heinz (heinz(AT)hs-heilbronn.de), Aug 23 2008
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