141807

Appears in sequences

• Number of 3 X 3 matrices with nonnegative integer entries and all row sums equal to n, up to row and column permutation.at n=17A058389
• Number of (5+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.at n=11A250760
• Magic sums of 3 X 3 magic squares composed of primes in an arithmetic progression.at n=31A269324