id:A146284 - OEIS Search Results

Search: id:A146284

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 111-110-111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 1, 5, 9, 17, 25, 55, 133, 419, 1009, 4455, 14333, 61219, 207501, 982915, 4258653, 26235061, 130258871, 1014665059, 6176852821 (list; graph; listen)

	OFFSET	`1,9`
	EXAMPLE	`Maximal 9 X 9 example` `.0.0.0.1.0.1.0.0.0` `.0.0.0.1.1.1.0.0.0` `.0.0.0.1.1.1.0.0.0` `.1.1.1.0.0.0.1.1.1` `.0.1.1.0.0.0.1.1.0` `.1.1.1.0.0.0.1.1.1` `.0.0.0.1.1.1.0.0.0` `.0.0.0.1.1.1.0.0.0` `.0.0.0.1.0.1.0.0.0`
	CROSSREFS	`Sequence in context: A080335 A089109 A100449 this_sequence A081295 A160426 A059743` `Adjacent sequences: A146281 A146282 A146283 this_sequence A146285 A146286 A146287`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

page 1

Search completed in 0.002 seconds

Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research