Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1010-1111 pattern in any orientation.
A146813
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1010-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =17a(8) =37a(9) =69a(10) =167a(11) =487a(12) =1595a(13) =5107a(14) =22241a(15) =105661a(16) =549863a(17) =3071095a(18) =17729121a(19) =112871021a(20) =819713685
External references
- oeis: A146813