66786710

Appears in sequences

• Squarefree part of n!: n! divided by its largest square divisor.at n=31A055204
• Squarefree part of the n-th central binomial coefficient.at n=31A056058
• The powerfree part of the central binomial coefficients.at n=31A056060
• 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=16A069113
• 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=15A085057
• Leading diagonal of triangle in A222310.at n=31A222311
• n!/pp, where pp is the largest perfect power (A001597) which divides n!.at n=32A251753
• a(n) is the least term in the n-th row of A360298.at n=31A360300