Number of partitions of n X n checkerboard into two edgewise-connected sets, counting partitions equal under rotation or reflection only once.

A068392

Number of partitions of n X n checkerboard into two edgewise-connected sets, counting partitions equal under rotation or reflection only once.

Terms

    a(0) =0a(1) =2a(2) =11a(3) =92a(4) =2100a(5) =140834

External references