Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 101-111-101 pattern in any orientation.
A146436
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 101-111-101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =1a(4) =3a(5) =9a(6) =23a(7) =73a(8) =239a(9) =601a(10) =4153a(11) =14191a(12) =114759a(13) =580339a(14) =5550888a(15) =46368603a(16) =562683992a(17) =5393792447a(18) =97221007962
External references
- oeis: A146436