id:A145926 - 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 tee 1,1 1,2 1,3 2,2 in any orientation.

+0
1

1, 1, 5, 1, 30, 11, 1066, 349, 107926, 18649, 30463506, 4281564, 28469202195, 3104114083, 81975632480940, 6299974483160, 716618459027321854, 40647817503851905, 19639345520014570444862, 820703096331703481460 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`Maximal 8 X 8 example` `.1.0.0.0.0.0.0.1` `.1.1.0.0.0.0.1.1` `.1.0.0.0.0.0.0.1` `.0.0.1.0.0.1.0.0` `.0.1.1.0.0.1.1.0` `.0.0.1.0.0.1.0.0` `.0.1.0.0.0.0.1.0` `.1.1.1.0.0.1.1.1`
	CROSSREFS	`Sequence in context: A144891 A135892 A049460 this_sequence A062140 A144355 A049353` `Adjacent sequences: A145923 A145924 A145925 this_sequence A145927 A145928 A145929`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 25 2008`

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.

AT&T Labs Research