id:A147434 - 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 1010-1111-0101 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 5, 17, 31, 51, 113, 291, 823, 2647, 8411, 31311, 121645, 537901, 2460285, 12092291, 63560047, 371846157, 2296989649 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.1.0.1.0.0.0.1.1` `.1.1.1.1.0.1.1.0` `.0.1.0.1.0.0.1.1` `.0.0.0.0.0.1.1.0` `.0.1.1.0.0.0.0.0` `.1.1.0.0.1.0.1.0` `.0.1.1.0.1.1.1.1` `.1.1.0.0.0.1.0.1`
	CROSSREFS	`Sequence in context: A143798 A031013 A031370 this_sequence A147336 A128354 A078654` `Adjacent sequences: A147431 A147432 A147433 this_sequence A147435 A147436 A147437`
	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