T(n,k)=Number of (n+1)X(k+1) 0..7 arrays with every 2X2 subblock summing to 14.

Terms

a(0) =344a(1) =2080a(2) =2080a(3) =13448a(4) =10088a(5) =13448a(6) =90784a(7) =54496a(8) =54496a(9) =90784a(10) =631784a(11) =316232a(12) =252920a(13) =316232a(14) =631784a(15) =4497760a(16) =1931680a(17) =1287136a(18) =1287136a(19) =1931680a(20) =4497760a(21) =32592008a(22) =12267368a(23) =7003928a(24) =5836328a(25) =7003928a(26) =12267368a(27) =32592008a(28) =239551264