A109897 - cp's OEIS frontend

A109897 Group the natural numbers so that every 2n-th group product is divisible by the single number in the next group. (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),... Sequence contains the product of terms in the 2n-th group.

n	a(n)
1	120
2	55440
3	253955520
4	4475671200
5	33891580800
6	7146019520640
7	106137499051584000
8	240679032790296606105600
9	74684882115043200
10	230656425830328960
11	66654064122818055916032000
12	171176782669200
13	282328002094320
14	126639913316232476160000
15	859891329773280

[120, 55440, 253955520, 4475671200, 33891580800, 7146019520640, 106137499051584000, 240679032790296606105600, 74684882115043200, 230656425830328960, 66654064122818055916032000, 171176782669200, 282328002094320, 126639913316232476160000, 859891329773280]

cp's OEIS Frontend

A109897 Group the natural numbers so that every 2n-th group product is divisible by the single number in the next group. (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),... Sequence contains the product of terms in the 2n-th group.

Table of values

List of values