A092608 - OEIS

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A092608

Number of connected ordered 5-element T_0-antichains on an unlabeled n-set.

0, 0, 0, 0, 30, 1945, 41901, 410505, 2363160, 9266220, 27058460, 62261590, 117178540, 185037520, 249548910, 290969170, 295695540, 263173865, 205581235, 140943485, 84636895, 44347105, 20159615, 7888705, 2629575, 736281, 169911, 31465, 4495, 465, 31, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	REFERENCES	`G. Kilibarda and V. Jovovic, "Enumeration of some classes of T_0-hypergraphs", in preparation, 2004.`
	FORMULA	`O.g.f.: 5!*A(ln(1+x)), where A(x) is e.g.f. for A094036.`
	CROSSREFS	`Sequence in context: A042743 A042740 A112003 * A092617 A056093 A056070` `Adjacent sequences: A092605 A092606 A092607 * A092609 A092610 A092611`
	KEYWORD	`fini,full,nonn`
	AUTHOR	`Goran Kilibarda, Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 22 2004`

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Last modified February 15 04:23 EST 2012. Contains 205694 sequences.