Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-010 pattern in any orientation.

A146222

Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 101-111-010 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =8a(7) =19a(8) =32a(9) =59a(10) =168a(11) =529a(12) =2001a(13) =7331a(14) =32274a(15) =148084a(16) =749186a(17) =4153139a(18) =26410348a(19) =177997054a(20) =1409667475a(21) =11785334777a(22) =115210607000

External references