A144075 - OEIS

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A144075

Thickness of the hypercube graph Q_n.

1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	LINKS	`Eric Weisstein's World of Mathematics, Graph Thickness`
	FORMULA	`G.f.: x(1+x^3-x^4)/((1-x)^2(1+x)(1+x^2)). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 12 2008]`
	MATHEMATICA	`Ceiling[(n+1)/4]`
	CROSSREFS	`Cf. A002265, A128929.` `Sequence in context: A008621 A002265 A110655 * A128929 A075245 A129253` `Adjacent sequences: A144072 A144073 A144074 * A144076 A144077 A144078`
	KEYWORD	`nonn`
	AUTHOR	`E. W. Weisstein (eric(AT)weisstein.com), Sep 09, 2008`

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Last modified February 14 10:09 EST 2012. Contains 205614 sequences.