Number of 2 X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

A268887

Number of 2 X n binary arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling two exactly once.

Terms

    a(0) =0a(1) =5a(2) =14a(3) =54a(4) =158a(5) =475a(6) =1340a(7) =3740a(8) =10204a(9) =27521a(10) =73354a(11) =193842a(12) =508346a(13) =1324791a(14) =3433720a(15) =8858104a(16) =22757432a(17) =58253885a(18) =148634502a(19) =378142446a(20) =959527766a(21) =2429034323a(22) =6135877428a(23) =15469187604a(24) =38929330452a(25) =97806402617a(26) =245354321666

External references