7142567040

Appears in sequences

• Triple factorial numbers a(n) = n!!!, defined by a(n) = n*a(n-3), a(0) = a(1) = 1, a(2) = 2. Sometimes written n!3.at n=27A007661
• Triple factorial numbers: (3n)!!! = 3^n*n!.at n=9A032031
• Product of numbers <= n that have a prime factor in common with n.at n=26A066570
• a(n) is the product of the positive integers each of which is <= n and is divisible by exactly one prime dividing n (but is coprime to every other prime dividing n). (a(1) = 1).at n=26A119794
• Triple factorials n!!!: a(n) = n*a(n-3).at n=27A161474
• a(n) = Product_{k in M_n} k, M_n = {k | 1 <= k <= 3n and k mod 3 = n mod 3}.at n=9A190903