25051

Appears in sequences

• Expansion of e.g.f. exp(x*(1-x)/(1-2*x)).at n=6A059280
• a(n+1) = a(n)+greatest prime divisor of a(n-1).at n=47A078695
• E.g.f. satisfies exp(x*Sum_{n>=0} ceiling(a(n)/n!)*x^n) = Sum_{n>=0} a(n)*x^n/n!.at n=6A085295
• a(n) = A007318 * [1, 6, 14, 9, 0, 0, 0, ...].at n=25A143690
• Positive integers of the form (10*m^2+1)/11.at n=30A179338
• Expansion of Product_{k>=1} (1 + x^k)^A001615(k), where A001615 is the Dedekind psi function.at n=17A301594