id:A146408 - OEIS Search Results

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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1111-0100 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 7, 21, 53, 267, 1477, 11799, 115813, 1314119, 18659927, 340219403, 7888629683, 233265020067, 8619893688875, 395425329029435, 22778671927694919, 1657248108130816043 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.1.0.0` `.0.0.0.1.1.0.0.0` `.0.0.0.0.1.0.1.0` `.0.1.0.0.1.0.1.0` `.1.1.1.1.0.1.1.0` `.1.0.0.0.1.0.1.1` `.0.0.1.1.1.1.0.0` `.0.0.0.0.0.1.0.0`
	CROSSREFS	`Sequence in context: A146733 A146709 A146400 this_sequence A050894 A146464 A001354` `Adjacent sequences: A146405 A146406 A146407 this_sequence A146409 A146410 A146411`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net)`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research