id:A146597 - 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 1000-1000-1111 pattern in any orientation.

+0
1

1, 1, 1, 1, 3, 7, 19, 51, 237, 1335, 8829, 68891, 649429, 7839465, 116522409, 2129542541, 47609599737, 1308687213295, 44429361526611, 1853713445956347 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.1.1.1.0.0.0` `.1.0.0.0.1.0.0.0` `.1.0.0.0.1.0.0.0` `.1.0.0.0.0.1.1.1` `.1.1.1.0.0.0.0.1` `.0.0.0.1.0.0.0.1` `.0.0.0.1.0.0.0.1` `.0.0.0.1.1.1.1.0`
	CROSSREFS	`Sequence in context: A011769 A087432 A135052 this_sequence A115254 A090378 A007180` `Adjacent sequences: A146594 A146595 A146596 this_sequence A146598 A146599 A146600`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Nov 04 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

AT&T Labs Research