A054883 - OEIS

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A054883

Number of walks of length n along the edges of a dodecahedron between two opposite vertices.

0, 0, 0, 0, 0, 6, 12, 84, 192, 882, 2220, 8448, 22704, 78078, 218988, 710892, 2048256, 6430794, 18837516, 58008216, 171619248, 522598230, 1555243404, 4705481220, 14051590080, 42357719586, 126740502252, 381253030704 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,6`
	FORMULA	`G.f.: -1/5-1/4/(t-1)-1/20/(3t-1)+1/5/(2t+1)+3/10/(5t^2-1). a(n)=(5+3^n+(-1)^n2^(n+2)-3(1+(-1)^n)sqrt(5)^n)/20 for n>0.`
	CROSSREFS	`Sequence in context: A071930 A061520 A196253 * A005402 A128953 A181597` `Adjacent sequences: A054880 A054881 A054882 * A054884 A054885 A054886`
	KEYWORD	`nonn`
	AUTHOR	`Paolo Dominici (pl.dm(AT)libero.it), May 23 2000`

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Last modified February 17 02:43 EST 2012. Contains 205978 sequences.