Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1001-1111 pattern in any orientation.
A147411
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1001-1001-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =5a(8) =13a(9) =27a(10) =43a(11) =73a(12) =179a(13) =423a(14) =1083a(15) =3071a(16) =10101a(17) =37829a(18) =144853a(19) =562367a(20) =2218397a(21) =9164725a(22) =42914033a(23) =209532563
External references
- oeis: A147411