A147319 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.

1, 1, 1, 1, 5, 1, 9, 1, 50, 19, 1045, 405, 26459, 5465, 942760, 98073, 47165993, 3767543, 4686396466, 402496574, 955119646127, 74080050007, 337888010503075, 18773415116111

Offset

1,5

Links

Table of n, a(n) for n=1..24.

Example

Maximal 9 X 9 example
.1.0.0.0.0.0.0.0.1
.1.0.0.0.0.0.0.0.1
.1.1.1.1.0.1.1.1.1
.1.0.0.0.0.0.0.0.1
.1.0.0.1.0.1.0.0.1
.0.0.0.1.0.1.0.0.0
.1.1.1.1.0.1.1.1.1
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0

Crossrefs

Sequence in context: A348980 A046580 A050358 * A147326 A336048 A143114

Adjacent sequences: A147316 A147317 A147318 * A147320 A147321 A147322

Keyword

nonn

Author

R. H. Hardin

Status

approved