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A155587
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Expansion of (1+x*c(x))/(1-x), c(x) the g.f. of A000108.
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2
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1, 2, 3, 5, 10, 24, 66, 198, 627, 2057, 6919, 23715, 82501, 290513, 1033413, 3707853, 13402698, 48760368, 178405158, 656043858, 2423307048, 8987427468, 33453694488, 124936258128, 467995871778, 1757900019102, 6619846420554
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Row sums of A155586. Hankel transform is A057079(n+2).
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REFERENCES
| Jean-Pierre Flori, Fonctions booleennes, courbes algebriques et multiplication complexe, Thesis, ParisTech, Feb 03 2012; http://www.infres.enst.fr/~flori/thesis/thesis.pdf
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LINKS
| Gerard Cohen and Jean-Pierre Flori, On a generalized combinatorial conjecture involving addition mod 2^k - 1
Guo-Niu Han, Enumeration of Standard Puzzles
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FORMULA
| a(n)=1+sum{k=0..n-1, A000108(k)}.
Conjecture: n*a(n) +(6-5*n)*a(n-1) +2*(2*n-3)*a(n-2)=0. - R. J. Mathar, Nov 15 2011
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CROSSREFS
| Sequence in context: A099967 A106531 A101163 * A125658 A001200 A050837
Adjacent sequences: A155584 A155585 A155586 * A155588 A155589 A155590
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KEYWORD
| easy,nonn,changed
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Jan 24 2009
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