A147421 Number of n X n binary arrays with all ones connected only in a 10101-11111 pattern in any orientation.

1, 1, 1, 1, 25, 149, 649, 7345, 81717, 923853, 27725125, 920411959, 33783967463

Offset

1,5

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.1.1.1.1.1.0.1.1
.1.0.1.0.1.0.0.1
.0.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.1
.1.0.0.0.0.0.1.1
.1.1.0.0.0.0.0.0
.1.0.0.1.0.1.0.1
.1.1.0.1.1.1.1.1

Crossrefs

Sequence in context: A123014 A366167 A095971 * A147083 A198030 A198000

Adjacent sequences: A147418 A147419 A147420 * A147422 A147423 A147424

Keyword

nonn

Author

R. H. Hardin

Status

approved