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Search: id:A067145
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| A067145 |
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Shifts left under reversion. |
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+0
7
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| 1, 1, -1, 3, -13, 69, -419, 2809, -20353, 157199, -1281993, 10963825, -97828031, 907177801, -8716049417, 86553001779, -886573220093, 9351927111901, -101447092428243, 1130357986741545, -12923637003161409
(list; graph; listen)
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OFFSET
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1,4
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LINKS
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N. J. A. Sloane, Transforms
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FORMULA
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G.f. satisfies A^(-1)(x) = A(x)/x - 1.
G.f. satisfies: A(A(x)) = (1+x)*A(x) = g.f. of A107094. - Paul D. Hanna (pauldhanna(AT)juno.com), May 12 2005
G.f. A(x) satisfies 0=f(x, A(x), A(A(x))) where f(a0, a1, a2)=a1-a2+a0*a1 . - Michael Somos May 21 2005
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PROGRAM
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(PARI) {a(n)=local(A); if(n<1, 0, A=x+O(x^2); for(i=2, n, A=x*(1+serreverse(A))); polcoeff(A, n))} /* Michael Somos May 21 2005 */
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CROSSREFS
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Cf. A107094.
Apart from signs, same as A088714. - Philippe DELEHAM, Jun 18 2006
Adjacent sequences: A067142 A067143 A067144 this_sequence A067146 A067147 A067148
Sequence in context: A020107 A128079 A074534 this_sequence A088714 A088368 A007808
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KEYWORD
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sign,eigen
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AUTHOR
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Christian G. Bower (bowerc(AT)usa.net), Jan 03 2002
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