Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.
A147419
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1111-0110 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =8a(8) =17a(9) =36a(10) =53a(11) =124a(12) =323a(13) =1007a(14) =2889a(15) =11702a(16) =39960a(17) =173688a(18) =672545a(19) =3448944a(20) =15619066a(21) =95906062a(22) =522271313a(23) =3756284779a(24) =24152062634
External references
- oeis: A147419