45660

Appears in sequences

• Number of ways to choose 3 points in an n X n X n triangular grid so that they do not form a 2 X 2 X 2 triangle.at n=9A234250
• a(n) is defined by the condition that the decimal expansion of the Sum_{n>=1} 1/(Sum_{k=1..n} a(k)) = 1/a(1) + 1/(a(1)+a(2)) + 1/(a(1)+a(2)+a(3)) + ... begins with the concatenation of these numbers; also a(1) = 10 and a(n) > a(n-1).at n=2A307021
• G.f.: Sum_{n>=0} (n+1)*(n+2)/2 * (x + x^n)^n.at n=58A325998