3829070245

Appears in sequences

• Squarefree part of n!: n! divided by its largest square divisor.at n=39A055204
• Squarefree part of C(2n,n), the central binomial numbers: the smallest number such that a(n)*C(2n,n) is a square.at n=20A069113
• a(n) is the smallest integer of the form a*b*c.../p*q*r..., where the numerator and the denominator contain n numbers each and a,b,c,...p,q,r... are all the integers from 1 to 2n.at n=19A085057
• n!/pp, where pp is the largest perfect power (A001597) which divides n!.at n=40A251753
• Numerator of (-1/3)^n*sqrt(Pi)/(Gamma(1/2 - n)*Gamma(1 + n)).at n=20A285019
• Squarefree k such that phi(k)/k - 1/2 is positive and minimal for k with gpf(k) = prime(n).at n=12A325236