T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock summing to a prime.

Terms

a(0) =114a(1) =856a(2) =856a(3) =6398a(4) =12998a(5) =6398a(6) =47874a(7) =194586a(8) =194586a(9) =47874a(10) =358070a(11) =2922936a(12) =5783416a(13) =2922936a(14) =358070a(15) =2679006a(16) =43856564a(17) =172965058a(18) =172965058a(19) =43856564a(20) =2679006a(21) =20039054a(22) =658509724a(23) =5162094982a(24) =10325081994a(25) =5162094982a(26) =658509724