id:A112101 - OEIS Search Results

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Number of interval orders of magnitude n having no duplicate holdings (NODH).

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1, 3, 10, 58, 722, 19826, 1161882, 141436842, 35192653666, 17733070720738, 17997787816364330, 36678689328450847514, 149831453090755680149490, 1225618861520566592060441682, 20064594684596858150355969600442, 657195622713393693107201875915723402 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`W. T. Trotter, Combinatorics and Partially Ordered Sets, Johns Hopkins, 1992; see p. 195.`
	FORMULA	`a(n) = Sum_{k=0..n} binomial(n, k)*A111491(k).`
	CROSSREFS	`Adjacent sequences: A112098 A112099 A112100 this_sequence A112102 A112103 A112104` `Sequence in context: A002218 A107871 A111270 this_sequence A103591 A018932 A111562`
	KEYWORD	`nonn`
	AUTHOR	`njas, Nov 28 2005`

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

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