T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 1 2 3 4 5 6 or 7.

A251373

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock summing to 1 2 3 4 5 6 or 7.

Terms

    a(0) =79a(1) =695a(2) =695a(3) =6113a(4) =17969a(5) =6113a(6) =53769a(7) =464393a(8) =464393a(9) =53769a(10) =472943a(11) =12002283a(12) =35257505a(13) =12002283a(14) =472943a(15) =4159927a(16) =310199103a(17) =2676962017a(18) =2676962017a(19) =310199103a(20) =4159927a(21) =36590017a(22) =8017100977a(23) =203249994369a(24) =597108952883

External references