id:A050974 - OEIS Search Results

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Number of binary arrangements on n X n array without three adjacent 1's in a row or column.

+0
2

2, 16, 265, 16561, 3157010, 1828904402, 3323590649777, 18691199385898465, 325778072452564800064, 17617718915229579206450786, 2954164381835835259001326344913, 1536134628973698280539373190731911729 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`S. R. Finch, Mathematical Constants, Cambridge, 2003, pp. 342-349.`
	LINKS	`S. R. Finch, Hard Square Entropy Constant` `Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.`
	CROSSREFS	`Any connected three 1's gives A067968.` `Cf. A006506.` `Adjacent sequences: A050971 A050972 A050973 this_sequence A050975 A050976 A050977` `Sequence in context: A140307 A114039 A090305 this_sequence A012188 A009764 A000182`
	KEYWORD	`nonn`
	AUTHOR	`Eric Weisstein (eric(AT)weisstein.com)`
	EXTENSIONS	`More terms from Ron Hardin (rhhardin(AT)att.net), Feb 02 2002`

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Last modified November 8 07:45 EST 2009. Contains 166143 sequences.

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