T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.

A251210

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2.

Terms

    a(0) =40a(1) =180a(2) =180a(3) =816a(4) =1246a(5) =816a(6) =3728a(7) =8870a(8) =8870a(9) =3728a(10) =17152a(11) =65040a(12) =102811a(13) =65040a(14) =17152a(15) =79424a(16) =489772a(17) =1273440a(18) =1273440a(19) =489772a(20) =79424a(21) =369920a(22) =3775022a(23) =16687766a(24) =27920380a(25) =16687766a(26) =3775022a(27) =369920a(28) =1731840a(29) =29664576

External references