Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1111-0100 pattern in any orientation.
A146592
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =23a(8) =47a(9) =75a(10) =181a(11) =675a(12) =3025a(13) =16403a(14) =71953a(15) =340893a(16) =1986607a(17) =14754733a(18) =121306057a(19) =1066980245a(20) =9641071515a(21) =101852566849
External references
- oeis: A146592