id:A146142 - OEIS Search Results

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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 5-point barb 1,1 1,2 2,2 2,3 3,2 in any orientation.

+0
1

1, 1, 1, 1, 1, 3, 23, 43, 81, 319, 1397, 6447, 41775, 230237, 1798489, 13587111, 143546329, 1450499749, 20575847369, 276390467445, 5233548027451, 93375391444657 (list; graph; listen)

	OFFSET	`1,6`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.1.0.0.0` `.0.0.0.0.1.1.0.0` `.0.1.0.1.1.0.0.0` `.1.1.1.0.0.1.0.0` `.0.0.1.0.0.1.1.1` `.0.0.0.1.1.0.1.0` `.0.0.1.1.0.0.0.0` `.0.0.0.1.0.0.0.0`
	CROSSREFS	`Sequence in context: A167216 A117738 A014582 this_sequence A105854 A160022 A060651` `Adjacent sequences: A146139 A146140 A146141 this_sequence A146143 A146144 A146145`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research