31550

Appears in sequences

• Number of nonnegative integer 3 X 3 matrices with sum of elements equal to n, up to rotational symmetry.at n=12A054771
• Coefficient triangle of polynomials (falling powers) related to Fibonacci convolutions. Companion triangle to A057282.at n=16A057281
• Coefficient triangle of polynomials (rising powers) related to Fibonacci convolutions. Companion triangle to A057280.at n=19A057995
• a(n) = n*(4*n^2 + n - 1)/2.at n=24A125200
• Number of right triangles on an (n+1) X 5 grid.at n=34A189809
• Number of nX3 arrays containing 3 copies of 0..n-1 with no element 1 greater than its north, west or southwest neighbor modulo n and the upper left element equal to 0.at n=4A266903
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no element 1 greater than its north, west or southwest neighbor modulo n and the upper left element equal to 0.at n=25A266904
• Number of 5Xn arrays containing n copies of 0..5-1 with no element 1 greater than its north, west or southwest neighbor modulo 5 and the upper left element equal to 0.at n=2A266907