183296

Appears in sequences

• Numbers that are the sum of 9 positive 11th powers.at n=13A004820
• Number of subsets of integers 1 through n (including the empty set) containing no pair of integers that share a common factor.at n=37A084422
• Triangle T, read by rows, T(n,k) = T(n-k)*2^(k*(n-k)) such that column 0 of the matrix square of T equals column 0 of T shifted left: [T^2](n,k) = T(n-k+1,0)*2^(k*(n-k)) for n>=k>=0.at n=29A118024
• Smallest i such that prime(n) divides gcd(sigma(i), phi(i)) (cf. A009223).at n=23A222714
• a(n) = n*((2*n + 1)*(2*n^2 + 2*n + 3) - 3*(-1)^n)/24.at n=32A325517
• Numerator of 4/(1 + 1^2/(3 + 2^2/(5 + 3^2/(7 + ... + (n-1)^2/(2*n-1) )))).at n=8A345125