A077139 - cp's OEIS frontend

A077139 a(1) = 1, a(n) = lcm(n, a(n-1)) / gcd(n, a(n-1)).

n	a(n)
1	1
2	2
3	6
4	6
5	30
6	5
7	35
8	280
9	2520
10	252
11	2772
12	231
13	3003
14	858
15	1430
16	5720
17	97240
18	437580
19	8314020
20	415701
21	969969
22	176358
23	4056234
24	2704156
25	67603900
26	2600150
27	70204050
28	10029150
29	290845350
30	9694845
31	300540195
32	9617286240
33	35263382880
34	1037158320

[1, 2, 6, 6, 30, 5, 35, 280, 2520, 252, 2772, 231, 3003, 858, 1430, 5720, 97240, 437580, 8314020, 415701, 969969, 176358, 4056234, 2704156, 67603900, 2600150, 70204050, 10029150, 290845350, 9694845, 300540195, 9617286240, 35263382880, 1037158320]

cp's OEIS Frontend

A077139 a(1) = 1, a(n) = lcm(n, a(n-1)) / gcd(n, a(n-1)).

Table of values

List of values