id:A039647 - OEIS Search Results

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Related to A000032 (Lucas numbers): (n-1)!*L(n).

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1, 3, 8, 42, 264, 2160, 20880, 236880, 3064320, 44634240, 722131200, 12853209600, 249559833600, 5249378534400, 118911189196800, 2886037330176000, 74715282690048000, 2055161959538688000, 59855791774851072000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Number of possible well-colored circuits.`
	LINKS	`C. Banderier, J.-M. Le Bars and V. Ravelomanana, Generating functions for kernels of digraphs`
	FORMULA	`a(n) = (n-1)!*L(n), L(n) := A000032(n); E.g.f.: -ln(1-x-x^2). Also a(n)/n! = sum(binomial(n-j, j)/(n-j), j=0..floor(n/2)).`
	CROSSREFS	`a(n) = A039692(n, 1) (first column of Fibonacci Jabotinsky-triangle).` `Sequence in context: A038048 A051763 A074435 this_sequence A071533 A000240 A132103` `Adjacent sequences: A039644 A039645 A039646 this_sequence A039648 A039649 A039650`
	KEYWORD	`easy,nonn`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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