Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 101-111-010 pattern in any orientation.
A146219
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 101-111-010 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =9a(6) =20a(7) =63a(8) =272a(9) =1557a(10) =10412a(11) =77761a(12) =729051a(13) =8641753a(14) =126757272a(15) =2289847876a(16) =50015283552
External references
- oeis: A146219