Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1100-0111 pattern in any orientation.
A146805
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1100-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =15a(8) =43a(9) =67a(10) =129a(11) =405a(12) =1595a(13) =5363a(14) =29827a(15) =122435a(16) =735349a(17) =3608129a(18) =24333239a(19) =151164887a(20) =1326517337
External references
- oeis: A146805