49059

Appears in sequences

• Expansion of (1-x)^(-1)/(1-2*x-2*x^2-2*x^3).at n=10A077827
• Duplicate of A077827.at n=10A077844
• Number of interior balls in a truncated tetrahedral arrangement.at n=23A092966
• a(n) = Sum_{1 <= x_1, x_2, x_3 <= n} n/gcd(x_1, x_2, x_3, n).at n=14A372952