87536

Appears in sequences

• Main diagonal of symmetric square table A084867, in which the antidiagonal sums (A006012) form the first row shifted left.at n=8A084868
• Number of 9X2 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 9 zero-sum 2-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=17A192709