id:A019988 - OEIS Search Results

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Number of ways of embedding a connected graph with n edges in the square lattice.

+0
2

1, 2, 5, 16, 55, 222, 950, 4265, 19591, 91678, 434005, 2073783, 9979772, 48315186, 235088794, 1148891118, 5636168859 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`M. Keller, Counting polyforms`
	CROSSREFS	`Sequence in context: A051960 A026106 A066642 this_sequence A137732 A057973 A052708` `Adjacent sequences: A019985 A019986 A019987 this_sequence A019989 A019990 A019991`
	KEYWORD	`nonn,nice,hard`
	AUTHOR	`Russ Cox (rsc(AT)swtch.com)`
	EXTENSIONS	`More terms from Brendan Owen (brendan_owen(AT)yahoo.com), Feb 20 2002`

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.