id:A146686 - 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 1100-1000-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 1, 3, 7, 15, 31, 63, 167, 435, 1337, 5021, 19355, 85901, 388093, 1971221, 10932161 (list; graph; listen)

	OFFSET	`1,8`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.1.1.1.1.0` `.0.0.0.1.0.0.0.1` `.0.0.0.1.1.0.0.1` `.1.1.1.0.0.1.0.1` `.1.0.1.0.0.1.1.1` `.1.0.0.1.1.0.0.0` `.1.0.0.0.1.0.0.0` `.0.1.1.1.1.0.0.0`
	CROSSREFS	`Sequence in context: A123121 A117060 A057613 this_sequence A129984 A146811 A147235` `Adjacent sequences: A146683 A146684 A146685 this_sequence A146687 A146688 A146689`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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

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