Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-101 pattern in any orientation.
A146260
Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 110-111-101 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =5a(8) =13a(9) =25a(10) =47a(11) =113a(12) =351a(13) =1317a(14) =5315a(15) =24057a(16) =110167a(17) =558903a(18) =3123765a(19) =20513901a(20) =147650027a(21) =1233473669a(22) =10827756731
External references
- oeis: A146260