164808

Appears in sequences

• Number of even nontotients not exceeding 2^n.at n=18A072077
• a(n) = 841*n^2 - 2*n.at n=13A158401
• Hyper-Wiener index of a benzenoid consisting of a zig-zag chain of n hexagons (s=13; see the Gutman et al. reference).at n=14A193394
• Numbers n for which there exists k > n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=32A255334