242550

Appears in sequences

• Numbers that can be written as k/d(k) in four or more ways, where d(k) = number of divisors of k.at n=25A051346
• Numbers k such that n | sigma_10(k) + phi(k)^10.at n=26A055704
• The n-th term of Chernoff sequence A006939 divided by (n + 1)!.at n=5A071627
• Triangle formed from coefficients of the polynomials p(1)=x, p(n+1) = (n + x*(n+1))*p(n) + x*x*(d/dx)p(n).at n=25A075856
• Triangle read by rows: coefficients of Yablonskii-Vorob'ev polynomials.at n=29A092766
• Coefficients of a set of polynomials associated with the derivatives of x^x.at n=34A185164
• Numbers with prime factorization pqr^2s^2t^2.at n=23A190379
• Numbers n such that n = k/d(k) has exactly 4 solutions, where d(k) = number of divisors of k.at n=23A217125
• Triangle read by rows: T(0,0)=1; T(m,0)=0; otherwise T(m,n) = (m-1)*T(m-1,n)+(m-1+n)*T(m-1,n-1).at n=33A239098
• Number of length 6+3 0..n arrays with some disjoint pairs in every consecutive four terms having the same sum.at n=12A247538
• a(n) = lcm(A260443(n), A260443(1+n)).at n=28A284008
• a(n) = lcm(A260443(n), A260443(1+n)).at n=29A284008
• Numbers that are product of a hexagonal number (A000384) and a square pyramidal numbers (A000330) in at least two ways.at n=30A306121
• a(n) = Product_{d|n, d<n} A019565(d)^[0 == d mod 3].at n=47A319990
• a(n) = Product_{d|n} A019565(phi(d)), where phi is Euler totient function A000010.at n=44A332824
• Expansion of e.g.f. 1/(1 - (x * log(1-x))^4 / 576).at n=11A353882
• Expansion of e.g.f. exp( (x * log(1-x))^4 / 576 ).at n=11A353893
• Integers y such that there exist two integers 0<x<=y<=z such that psi(x) = psi(y) = psi(z) = x + y + z.at n=5A386901