id:A111491 - OEIS Search Results

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a(0) = 1; for n>0, a(n) = (2^n-1)*a(n-1)-(-1)^n.

+0
2

1, 2, 5, 36, 539, 16710, 1052729, 133696584, 34092628919, 17421333377610, 17822024045295029, 36481683220718924364, 149392492788843995270579, 1223673908433421165261312590, 20047449641864738950476084161969, 656894782414981901190249849735238224 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`W. T. Trotter, Combinatorics and Partially Ordered Sets, Johns Hopkins, 1992; see p. 195.`
	MAPLE	`s:=proc(n) option remember; if n=0 then 1 else (2^n-1)*s(n-1)-(-1)^n; fi; end;`
	CROSSREFS	`Cf. A111968.` `Sequence in context: A059586 A086832 A147964 this_sequence A086218 A138658 A067464` `Adjacent sequences: A111488 A111489 A111490 this_sequence A111492 A111493 A111494`
	KEYWORD	`nonn,new`
	AUTHOR	`njas, Nov 28 2005, typo corrected Nov 21 2008`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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