id:A146790 - 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 0100-1100-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 5, 17, 67, 311, 1473, 7613, 68761, 661093, 8801627, 124939017, 2484498069, 53077957657 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.1.1.1` `.1.0.0.0.1.1.0.0` `.1.0.0.0.0.1.0.0` `.1.1.1.0.0.0.1.1` `.1.1.0.0.0.1.1.1` `.0.0.1.0.0.0.0.1` `.0.0.1.1.0.0.0.1` `.1.1.1.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A149694 A149695 A162270 this_sequence A149696 A096980 A149697` `Adjacent sequences: A146787 A146788 A146789 this_sequence A146791 A146792 A146793`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.