id:A146177 - 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 110-100-111 pattern in any orientation.

+0
1

1, 1, 1, 1, 1, 1, 13, 33, 61, 115, 431, 1359, 5125, 23279, 156491, 866819, 5189807, 30665629, 248556857, 1970821419, 20754531695, 214278299237 (list; graph; listen)

	OFFSET	`1,7`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.1.0` `.1.1.1.0.1.0.1.0` `.0.0.1.0.1.1.1.0` `.0.1.1.0.0.0.0.0` `.0.0.0.0.0.1.1.0` `.0.1.1.1.0.1.0.0` `.0.1.0.1.0.1.1.1` `.0.1.0.0.0.0.0.0`
	CROSSREFS	`Sequence in context: A146052 A082109 A024839 this_sequence A146194 A124659 A164539` `Adjacent sequences: A146174 A146175 A146176 this_sequence A146178 A146179 A146180`
	KEYWORD	`nonn`
	AUTHOR	`Ron Hardin (rhhardin(AT)att.net), Oct 27 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

AT&T Labs Research