id:A146590 - OEIS Search Results

Search: id:A146590

Displaying 1-1 of 1 results found.

page 1

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0110-1111-0100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 5, 13, 25, 41, 73, 405, 2087, 9095, 31781, 109905, 706437, 6193961, 52066515, 395176419, 2801856537, 27230658787 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.0.0.0` `.0.0.1.1.1.1.0.0` `.0.1.0.1.1.0.1.0` `.0.1.1.0.0.1.1.1` `.1.1.1.0.0.1.1.0` `.0.1.0.1.1.0.1.0` `.0.0.1.1.1.1.0.0` `.0.0.0.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A001844 A099776 A133322 this_sequence A098483 A147205 A146875` `Adjacent sequences: A146587 A146588 A146589 this_sequence A146591 A146592 A146593`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

page 1

Search completed in 0.002 seconds

Last modified December 18 21:32 EST 2009. Contains 171025 sequences.

AT&T Labs Research