A058371 - OEIS

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A058371

The sequence S defined in A058540.

0, 0, 1, 3, 12, 48, 217, 1005, 4878, 24218, 123021, 634995, 3323963, 17596131, 94053675, 506865965, 2751093957, 15025119759, 82511460766, 455331632088, 2523688452540, 14042621802676, 78415665739800, 439298161502112, 2468288819015277 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,4`
	MAPLE	`spec := [ S, {N=Union(Z, S, P, Q), S=Set(Union(Z, P, Q), card>=2), P=Set(Union(Z, S, Q), card>=2), Q=Set(Union(Z, S, P), card>=2)} ]; [seq(combstruct[count](spec, size=n), n=0..40)]; # N=A058540, S=A058371` `spec:=[S, {S=Set(Union(Z, S, S), card>=2)}]; [seq(combstruct[count](spec, size=n), n=0..25)]; - Vladeta Jovovic (vladeta(AT)eunet.rs), Jun 25 2007`
	CROSSREFS	`Cf. A058575.` `Sequence in context: A142873 A151168 A151169 * A060113 A134589 A178872` `Adjacent sequences: A058368 A058369 A058370 * A058372 A058373 A058374`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Dec 26 2000`

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Last modified February 16 14:37 EST 2012. Contains 205930 sequences.