id:A146387 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 4, 7, 18, 33, 62, 229, 826, 2874, 11455, 45319, 227245, 1250786, 7902554, 51293369, 381222454, 3041924174, 28668489843, 286940122325, 3336283386716 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.1.1.1.1.0.0` `.0.0.0.1.1.0.0.0` `.1.0.0.0.0.0.0.1` `.1.1.0.0.0.0.1.1` `.1.1.0.0.0.0.1.1` `.1.0.0.0.0.0.0.1` `.0.0.0.1.1.0.0.0` `.0.0.1.1.1.1.0.0`
	CROSSREFS	`Sequence in context: A147366 A056318 A011948 this_sequence A124400 A077920 A135582` `Adjacent sequences: A146384 A146385 A146386 this_sequence A146388 A146389 A146390`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research