Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.
A232874
Number of (n+1)X(4+1) 0..1 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..4+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.
Terms
- a(0) =39a(1) =311a(2) =2715a(3) =21639a(4) =133532a(5) =706994a(6) =3457755a(7) =16257008a(8) =72992744a(9) =309583532a(10) =1229822682a(11) =4620454491a(12) =16559895238a(13) =56785677343a(14) =186875868230
External references
- oeis: A232874