id:A039765 - OEIS Search Results

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Number of edges in the Hasse diagrams for the D-analogues of the partition lattices.

+0
3

0, 0, 4, 31, 240, 1931, 16396, 147589, 1408224, 14214559, 151394940, 1696783221, 19958826080, 245788962199, 3161635135340, 42390110260685, 591257152058944, 8563898444592927, 128598641049231996 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`R. Suter, Two analogues of a classical sequence, J. Integer Sequences, Vol. 3 (2000), #P00.1.8.`
	FORMULA	`E.g.f.: f_4(x) g_1(x) e_1(f_2(x)) + e_1(x) g_4(x) e_1(g_2(x))` `e_n(x) = 1/n exp(n x); f_n(x) = 1/n (exp(n x) - 1); g_n(x) = 1/n (exp(n x) - 1 - n x)`
	CROSSREFS	`Edges in the Hasse diagrams for partition lattices: A003128, B-analogues = A039759.` `Adjacent sequences: A039762 A039763 A039764 this_sequence A039766 A039767 A039768` `Sequence in context: A005216 A014537 A136284 this_sequence A001091 A077615 A025506`
	KEYWORD	`nonn,nice`
	AUTHOR	`Ruedi Suter (suter(AT)math.ethz.ch)`

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.

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