login
A147406
Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1001-1001-1111 pattern in any orientation.
0
1, 1, 1, 5, 1, 9, 9, 43, 127, 501, 1169, 21077, 14501, 1245641, 426195, 52418221, 46737495, 4157184667, 7896602235, 878958425775, 1373529372451, 470697855207829, 348267628548895, 343015836691596183
OFFSET
1,4
EXAMPLE
Maximal 8 X 8 example
.0.0.1.1.1.1.0.0
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.0.0.0.0.0.0.0.0
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
CROSSREFS
Sequence in context: A082020 A256559 A182498 * A147354 A134233 A100542
KEYWORD
nonn
AUTHOR
STATUS
approved