T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in 2X2 subblocks nondecreasing rightwards and downwards.

A206512

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in 2X2 subblocks nondecreasing rightwards and downwards.

Terms

    a(0) =81a(1) =549a(2) =549a(3) =3399a(4) =7737a(5) =3399a(6) =19797a(7) =93405a(8) =93405a(9) =19797a(10) =111495a(11) =1020756a(12) =2105607a(13) =1020756a(14) =111495a(15) =614367a(16) =10505604a(17) =41873838a(18) =41873838a(19) =10505604a(20) =614367a(21) =3337695a(22) =103812645a(23) =769739571a(24) =1483188648a(25) =769739571a(26) =103812645

External references