T(n,k) = Number of (n+1) X (k+1) 0..5 arrays with every 2 X 2 subblock summing to 10.

Terms

a(0) =146a(1) =666a(2) =666a(3) =3254a(4) =2442a(5) =3254a(6) =16626a(7) =9990a(8) =9990a(9) =16626a(10) =87686a(11) =43986a(12) =35162a(13) =43986a(14) =87686a(15) =473586a(16) =204246a(17) =135966a(18) =135966a(19) =204246a(20) =473586a(21) =2605574a(22) =987762a(23) =563114a(24) =469146a(25) =563114a(26) =987762a(27) =2605574a(28) =14548626a(29) =4934070