id:A147488 - OEIS Search Results

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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11011-01110-00100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 5, 20, 49, 167, 643, 3053, 16577, 118904, 896633, 8867027, 91561000, 1224859380, 17454229913 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.0.1.1` `.1.0.0.0.1.1.1.0` `.1.1.0.0.0.1.0.1` `.0.1.1.0.0.0.1.1` `.1.1.0.0.0.1.1.0` `.1.0.1.0.0.0.1.1` `.0.1.1.1.0.0.0.1` `.1.1.0.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A033429 A147002 A005287 this_sequence A134481 A062158 A034133` `Adjacent sequences: A147485 A147486 A147487 this_sequence A147489 A147490 A147491`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 4 15:11 EST 2009. Contains 170347 sequences.