267674

Appears in sequences

• Number of nonseparable toroidal tree-rooted maps with n + 2 edges and n + 1 vertices.at n=21A006414
• Numbers of the form 12*k + 2 with nonempty inverse totient set.at n=28A063668
• a(n) = n^4 - n^3.at n=23A085537
• a(n) = n*(n + 1)^3.at n=22A085540
• a(n) = p^3*(p-1), where p = prime(n).at n=8A138403
• a(n) = ((n-th prime)^5-(n-th prime)^3)/24.at n=8A138438
• a(n) = phi(n^4).at n=22A189393
• Sum of even integers <= n times the sum of odd integers <= n.at n=45A330520
• G.f. satisfies A(x) = A(x^2 + x^3)/x^2 - 1.at n=26A389472