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.
A075352
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.
Terms
- a(0) =1a(1) =2a(2) =12a(3) =30a(4) =504a(5) =1320a(6) =43680a(7) =116280a(8) =6375600a(9) =17100720a(10) =1402410240a(11) =3776965920a(12) =8835488640
External references
- oeis: A075352