A146382 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1111 pattern in any orientation.

1, 1, 1, 7, 5, 40, 19, 418, 491, 27240, 24451, 2971576, 2078908, 614382155, 474528877, 322682051335, 262749927910, 400764203886592, 313224621598547, 1137774558755597994, 881352408772896894, 7433275932107389413579

Offset

1,4

Links

Table of n, a(n) for n=1..22.

Example

Maximal 8 X 8 example
.1.0.1.1.1.1.0.1
.1.1.0.1.1.0.1.1
.1.1.0.0.0.0.1.1
.1.0.1.1.1.1.0.1
.0.1.0.1.1.0.1.0
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0

Crossrefs

Sequence in context: A070426 A341431 A142883 * A163742 A202130 A089244

Adjacent sequences: A146379 A146380 A146381 * A146383 A146384 A146385

Keyword

nonn

Author

R. H. Hardin

Status

approved