Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11000-01111-11000 pattern in any orientation.
A147458
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 11000-01111-11000 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =21a(10) =34a(11) =61a(12) =142a(13) =363a(14) =998a(15) =3151a(16) =10096a(17) =34473a(18) =121095a(19) =493961a(20) =2091176a(21) =9966879a(22) =48888970a(23) =265507652
External references
- oeis: A147458