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

A146911

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0100-1110-0111-0010 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) =21a(13) =21a(14) =85a(15) =85a(16) =553a(17) =553a(18) =5197a(19) =5197a(20) =59067a(21) =59067a(22) =895397a(23) =895397a(24) =19192871a(25) =19192871a(26) =570897325a(27) =570897325a(28) =23035046469a(29) =23035046469

External references