90013

Appears in sequences

• Numbers n not of the form i^2+(i+1)^2 such that there are integers a < b with a^2+(a+1)^2+...+(n-1)^2 = n^2+(n+1)^2+...+b^2.at n=33A094523
• Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <=8.at n=5A195886
• T(n,k) = Number of lower triangles of an n X n integer array with all row and column sums zero and all row and column sums of squares <= 2k^2.at n=26A195892
• Number of lower triangles of a 6X6 integer array with all row and column sums zero and all row and column sums of squares <= 2n^2.at n=1A195894
• Numbers n such that A = n - digitsum(n) is divisible by the largest power of 10 <= A.at n=42A242474
• Triangle T(n,k) read by rows: fibonomial coefficients sums triangle.at n=50A305695