id:A147471 - OEIS Search Results

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Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1100-1111-0100-0100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 3, 3, 9, 15, 33, 57, 163, 337, 1301, 3059, 12941, 34215, 171133, 573633, 3343793, 12826849, 85459189, 371588907, 2938061259, 15238544087, 143663828309 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.0.0.0.1.1` `.0.0.1.0.1.1.1.1` `.1.1.1.1.0.0.1.0` `.0.0.1.1.0.0.1.0` `.0.1.0.0.1.1.0.0` `.0.1.0.0.1.1.1.1` `.1.1.1.1.0.1.0.0` `.1.1.0.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A052436 A122847 A105423 this_sequence A166265 A062510 A000200` `Adjacent sequences: A147468 A147469 A147470 this_sequence A147472 A147473 A147474`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research