Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.

A147102

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =7a(5) =15a(6) =33a(7) =93a(8) =429a(9) =2069a(10) =10289a(11) =55429a(12) =387995a(13) =3482253a(14) =35863559a(15) =411870399a(16) =5523860439a(17) =89237334993

External references