T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing sum of every two consecutive values in every row and column.
A251974
T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with nondecreasing sum of every two consecutive values in every row and column.
Terms
- a(0) =256a(1) =1600a(2) =1600a(3) =10000a(4) =20000a(5) =10000a(6) =40000a(7) =250000a(8) =250000a(9) =40000a(10) =160000a(11) =1750000a(12) =6250000a(13) =1750000a(14) =160000a(15) =490000a(16) =12250000a(17) =76562500a(18) =76562500a(19) =12250000a(20) =490000a(21) =1500625a(22) =60025000a(23) =937890625a(24) =1500625000a(25) =937890625
External references
- oeis: A251974