Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-1111 pattern in any orientation.
A146742
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-1111 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =7a(8) =15a(9) =27a(10) =47a(11) =131a(12) =579a(13) =2405a(14) =9787a(15) =35829a(16) =162637a(17) =924049a(18) =6701259a(19) =48977223a(20) =381859081a(21) =3048055139a(22) =30000129347
External references
- oeis: A146742