198316

Appears in sequences

• Number of 10 X 2 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 10 zero-sum 2-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations).at n=18A192711
• Solutions to A000010(x) + A000010(x-1) = A000010(2*x).at n=22A299535