T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with each 2X2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

A234832

T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with each 2X2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases.

Terms

    a(0) =69a(1) =516a(2) =516a(3) =3843a(4) =9207a(5) =3843a(6) =28602a(7) =161631a(8) =161631a(9) =28602a(10) =212850a(11) =2826144a(12) =6566460a(13) =2826144a(14) =212850a(15) =1583955a(16) =49366557a(17) =263929692a(18) =263929692a(19) =49366557a(20) =1583955a(21) =11787201a(22) =862112943a(23) =10572386472a(24) =24157113543a(25) =10572386472

External references