Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1111-0110 pattern in any orientation.

A146614

Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1111-0110 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) =71a(12) =211a(13) =797a(14) =3273a(15) =14255a(16) =57311a(17) =279147a(18) =1519281a(19) =10176213a(20) =72296847a(21) =593664689

External references