Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
A147196
Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0100-0111-0001 pattern in any orientation.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =5a(5) =13a(6) =27a(7) =85a(8) =297a(9) =1599a(10) =7901a(11) =42229a(12) =268975a(13) =2452217a(14) =25491849a(15) =280714479a(16) =3504622659a(17) =56285411319
External references
- oeis: A147196