Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
A147153
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =5a(8) =29a(9) =53a(10) =103a(11) =395a(12) =1381a(13) =4229a(14) =19741a(15) =89165a(16) =570891a(17) =3054965a(18) =21029525a(19) =147769545a(20) =1255506947
External references
- oeis: A147153