T(n,k)=1/12 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing three of each value.

A184386

T(n,k)=1/12 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing three of each value.

Terms

    a(0) =140a(1) =545a(2) =545a(3) =2174a(4) =1494a(5) =2174a(6) =9113a(7) =4281a(8) =4281a(9) =9113a(10) =43295a(11) =13616a(12) =8936a(13) =13616a(14) =43295a(15) =212747a(16) =55386a(17) =21473a(18) =21473a(19) =55386a(20) =212747a(21) =1096781a(22) =242370a(23) =73139a(24) =38642a(25) =73139a(26) =242370a(27) =1096781a(28) =6045233a(29) =1165496

External references