T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum.

A185571

T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum.

Terms

    a(0) =0a(1) =704a(2) =704a(3) =1936a(4) =15776a(5) =1936a(6) =34816a(7) =319448a(8) =319448a(9) =34816a(10) =172992a(11) =7140256a(12) =13565936a(13) =7140256a(14) =172992a(15) =2053216a(16) =159990728a(17) =886180500a(18) =886180500a(19) =159990728a(20) =2053216a(21) =12950528a(22) =3638705368a(23) =48714917964

External references