100180065

Appears in sequences

• Largest squarefree number dividing n-th central binomial coefficient C(n,[ n/2 ]).at n=30A048633
• Maximum over k of the largest squarefree number dividing a value of binomial(n,k).at n=30A048681
• Numerators of Taylor series expansion of arcsin(x). Also arises from arccos(x), arccsc(x), arcsec(x), arcsinh(x).at n=16A055786
• Denominators of values T(m,m) of urn game described in A108885 and A108886.at n=16A108884
• Divide n! repeatedly by i! for i from floor(n/2) down through 2; a(n) = remaining quotient.at n=32A111866
• Numerators of coefficient of x^(n+1/2) in the series expansion of the haversine.at n=16A143581
• Denominators of the BG1[ -5,n] coefficients of the BG1 matrix.at n=16A162444
• a(1) = 1 and for any n > 1, if A330647(n) divides a(n-1) then a(n) = a(n-1) / A330647(n), otherwise a(n) = a(n-1) * A330647(n).at n=29A330648
• a(1) = 1; for n > 1, a(n) = A055231(a(n-1) * n), where A055231(k) is the powerfree part of k.at n=31A368823