Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.
A146476
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =5a(4) =9a(5) =21a(6) =67a(7) =487a(8) =1541a(9) =16797a(10) =92947a(11) =1357947a(12) =11628507a(13) =269865307a(14) =3412847085a(15) =120253566545
External references
- oeis: A146476