id:A141486 - OEIS Search Results

Search: id:A141486

Displaying 1-1 of 1 results found.

page 1

Number of n X n binary matrices, symmetric about the diagonal and under 90 degree rotation, with no more than 1 one in any 2 X 2 subblock.

+0
2

1, 2, 1, 3, 2, 9, 3, 28, 9, 137, 28, 811, 137, 6884, 811, 75303, 6884, 1133287, 75303, 22573092, 1133287, 608722751, 22573092, 21933950111, 608722751, 1064082678978, 21933950111, 69200610896639, 1064082678978, 6047740350081131, 69200610896639 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A005247 A135259 A122147 this_sequence A144243 A125210 A098434` `Adjacent sequences: A141483 A141484 A141485 this_sequence A141487 A141488 A141489`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Aug 09 2008`

page 1

Search completed in 0.002 seconds

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research