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A091702 Column 0 of triangle A091700. 2
1, 2, 7, 23, 78, 264, 895, 3034, 10286, 34872, 118225, 400813, 1358859, 4606881, 15618510, 52950761, 179516682, 608607667, 2063336333, 6995240208, 23715661274, 80402183905, 272584057514, 924129977596, 3133038018732 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

FORMULA

G.f.: (1-x-x^2)/(1-3x-2x^2+2x^3+x^4).

CROSSREFS

Sequence in context: A042575 A052924 A067324 * A068593 A198944 A112657

Adjacent sequences:  A091699 A091700 A091701 * A091703 A091704 A091705

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jan 29 2004

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Last modified February 14 18:47 EST 2012. Contains 205663 sequences.