id:A056639 - OEIS Search Results

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Number of polygons of length 2n with 3 (self-avoiding polygon) holes on square lattice (not allowing rotations).

+0
2

62, 3920, 130560, 3058544, 56925214, 900355884, 12619939046, 161208191596, 1913821820768, 21416926011756, 228320059956022, 2337581305737496, 23128907576991302, 222266054948571020, 2082868947950189248 (list; graph; listen)

	OFFSET	`16,1`
	LINKS	`I. Jensen, Table of n, a(n) for n = 16..45 (from link below)` `I. Jensen, More terms`
	CROSSREFS	`Cf. A002931.` `Sequence in context: A137219 A065991 A042861 this_sequence A123806 A093262 A159374` `Adjacent sequences: A056636 A056637 A056638 this_sequence A056640 A056641 A056642`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Aug 30 2000`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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