Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.
A146709
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1111-0100 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =7a(6) =21a(7) =51a(8) =237a(9) =1129a(10) =8811a(11) =85099a(12) =859569a(13) =10699439a(14) =171553261a(15) =3455226259a(16) =90780787231
External references
- oeis: A146709