106513

Appears in sequences

• a(1)=1, a(2)=2, a(3)=3; for n >= 3, a(n) is smallest number such that all a(i) for 1 <= i <= n are distinct, all a(i)+a(j) for 1 <= i < j <= n are distinct and all a(i)+a(j)+a(k) for 1 <= i < j < k <= n are distinct.at n=35A036241
• a(n) = n*(n + 1)*(5*n^2 + 5*n - 4)/12.at n=22A264853