129801

Appears in sequences

• a(n) = n^2*(2*n^2 + 1)/3.at n=21A071270
• Eigensequence of A053121.at n=14A130018
• Number of arrays of 2n nondecreasing integers in -3..3 with sum zero and equal numbers greater than zero and less than zero.at n=39A203286
• Number of (n+1)X(1+1) 0..3 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..1+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=5A232706
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=15A232708
• T(n,k)=Number of (n+1)X(k+1) 0..3 arrays x(i,j) with row sums sum{j^2*x(i,j), j=1..k+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.at n=20A232708