T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.

A251258

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with every 2X2 subblock having a single 1 or two 1s on the same edge.

Terms

    a(0) =8a(1) =18a(2) =18a(3) =38a(4) =56a(5) =38a(6) =84a(7) =150a(8) =150a(9) =84a(10) =180a(11) =446a(12) =464a(13) =446a(14) =180a(15) =394a(16) =1232a(17) =1770a(18) =1770a(19) =1232a(20) =394a(21) =850a(22) =3602a(23) =5680a(24) =9130a(25) =5680a(26) =3602a(27) =850a(28) =1852a(29) =10108

External references