Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

A146903

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =3a(9) =3a(10) =9a(11) =9a(12) =19a(13) =19a(14) =49a(15) =49a(16) =345a(17) =345a(18) =3029a(19) =3029a(20) =26343a(21) =26343a(22) =253497a(23) =253497a(24) =4034589a(25) =4034589a(26) =91237121a(27) =91237121a(28) =2505865849a(29) =2505865849

External references