Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0001 pattern in any orientation.

A146609

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1111-0001 pattern in any orientation.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =13a(6) =31a(7) =93a(8) =435a(9) =2055a(10) =12617a(11) =84101a(12) =749259a(13) =7832803a(14) =101765203a(15) =1516307327a(16) =27862176903a(17) =604272411455

External references