17100720

Appears in sequences

• Product of 5 consecutive integers.at n=30A052787
• E.g.f.: x^5*exp(x)-x^5.at n=30A052800
• a(n) = 5n*(5n-1)*(5n-2)*(5n-3)*(5n-4).at n=6A054778
• Group the natural numbers so that the product of the terms of the n-th group is just >= n!: (1), (2), (3, 4), (5, 6), (7, 8, 9), (10, 11, 12), (13, 14, 15, 16), (17, 18, 19, 20), (21, 22, 23, 24, 25), (26, 27, 28, 29, 30), ... Sequence gives product of numbers in each group.at n=9A075352
• a(n) = (5*n)!/(4*n+1)!.at n=6A365341