id:A145953 - OEIS Search Results

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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a zee 1,1 1,2 2,2 2,3 in any orientation.

+0
1

1, 1, 1, 1, 7, 11, 159, 327, 5133, 13861, 849385, 3108015, 457381857, 2235253839, 607242639437, 3907846853149, 2764340116761305, 23642760363071615, 40211844595990066697, 457112748895519083981, 1725707575657931227023395 (list; graph; listen)

	OFFSET	`1,5`
	EXAMPLE	`Maximal 8 X 8 example` `.0.1.0.0.0.0.1.0` `.1.1.0.0.0.0.1.1` `.1.0.0.0.0.0.0.1` `.0.1.0.0.0.0.1.0` `.1.1.0.0.0.0.1.1` `.1.0.0.0.0.0.0.1` `.0.1.1.0.0.1.1.0` `.1.1.0.0.0.0.1.1`
	CROSSREFS	`Sequence in context: A057737 A130704 A038543 this_sequence A154303 A128340 A106716` `Adjacent sequences: A145950 A145951 A145952 this_sequence A145954 A145955 A145956`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 25 2008`

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.

AT&T Labs Research