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Search: id:A007548
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| A007548 |
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Shifts 3 places left under exponentiation.
(Formerly M1485)
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+0
1
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| 1, 1, 1, 1, 2, 5, 15, 53, 213, 961, 4808, 26405, 157965, 1022573, 7122441, 53118601, 422362118, 3566967917, 31887812715, 300848966213, 2987359924149, 31143724848889, 340113005563268, 3882897830626949, 46254432194746377
(list; graph; listen)
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OFFSET
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1,5
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
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M. Bernstein and N. J. A. Sloane, Some canonical sequences of integers, Linear Alg. Applications, 226-228 (1995), 57-72; erratum 320 (2000), 210.
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MAPLE
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exptr:= proc (p) local g; g:= proc(n) option remember; p(n) +add (binomial (n-1, k-1) *p(k) *g(n-k), k=1..n-1) end: end: b:= exptr (a): a:= n-> `if` (n<=2, 1, b(n-3)): seq (a(n), n=1..30); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 07 2008]
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CROSSREFS
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Sequence in context: A134381 A107589 A006790 this_sequence A120567 A125280 A022493
Adjacent sequences: A007545 A007546 A007547 this_sequence A007549 A007550 A007551
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KEYWORD
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nonn,eigen
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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