Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1101-0111 pattern in any orientation.

A147055

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0100-1101-0111 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =3a(8) =9a(9) =19a(10) =33a(11) =55a(12) =157a(13) =613a(14) =2645a(15) =10617a(16) =38367a(17) =155201a(18) =818161a(19) =5194409a(20) =36087637a(21) =257389985

External references