A146414 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1111-1000 pattern in any orientation.

1, 1, 1, 1, 5, 1, 29, 11, 724, 325, 31142, 7645, 1978797, 300177, 263468079, 35068989, 83745434537, 8987242465, 57534772999525, 4827346731624, 81084039874056659, 5040256291437877, 231986761011592759892, 10850930640918160916

Offset

1,5

Links

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

Example

Maximal 8 X 8 example:
  0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0
  0 1 0 0 0 0 1 0
  0 1 0 0 0 0 1 0
  0 1 0 0 0 0 1 0
  1 1 1 0 0 1 1 1

Crossrefs

Sequence in context: A096645 A140713 A125906 * A146374 A188647 A232015

Adjacent sequences: A146411 A146412 A146413 * A146415 A146416 A146417

Keyword

nonn

Author

R. H. Hardin

Status

approved