T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0101 0111.

A259515

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with each 2X2 subblock having clockwise pattern 0000 0001 0101 0111.

Terms

    a(0) =11a(1) =31a(2) =31a(3) =87a(4) =129a(5) =87a(6) =245a(7) =533a(8) =533a(9) =245a(10) =689a(11) =2219a(12) =3270a(13) =2219a(14) =689a(15) =1939a(16) =9227a(17) =20293a(18) =20293a(19) =9227a(20) =1939a(21) =5455a(22) =38409a(23) =126045a(24) =189211a(25) =126045a(26) =38409a(27) =5455a(28) =15349a(29) =159845

External references