id:A146457 - 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 1100-0111-0010 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 3, 5, 15, 27, 85, 213, 947, 2889, 18347, 72469, 534735, 2688781, 25770975, 165859999, 2076582639, 17137608411, 273236370839, 2882703759335, 58601499839763 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.1.1.0` `.0.0.0.1.1.1.0.1` `.0.0.0.0.1.0.1.1` `.0.1.0.0.0.1.1.0` `.0.1.1.0.0.0.1.0` `.1.1.0.1.0.0.0.0` `.1.0.1.1.1.0.0.0` `.0.1.1.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A146582 A053351 A146244 this_sequence A051044 A003536 A118173` `Adjacent sequences: A146454 A146455 A146456 this_sequence A146458 A146459 A146460`
	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