A147418 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 6, 3, 13, 9, 46

Offset

1,8

Links

Table of n, a(n) for n=1..16.

Example

Maximal 8 X 8 example
.0.0.1.0.0.1.0.0
.0.0.1.1.1.1.0.0
.1.1.0.1.1.0.1.1
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.1.1.0.1.1.0.1.1
.0.0.1.1.1.1.0.0
.0.0.1.0.0.1.0.0

Crossrefs

Sequence in context: A328612 A243824 A146938 * A146386 A305098 A128099

Adjacent sequences: A147415 A147416 A147417 * A147419 A147420 A147421

Keyword

nonn,more

Author

R. H. Hardin

Status

approved