A126262 - cp's OEIS frontend

A126262 a(n) is the denominator of the sum of the reciprocals of the positive integers k, k<=n, where every positive integer <= k and coprime to k is also coprime to n.

n	a(n)
1	1
2	2
3	6
4	4
5	60
6	3
7	140
8	24
9	9
10	20
11	27720
12	4
13	360360
14	84
15	10
16	560
17	12252240
18	36
19	77597520
20	10
21	21
22	1320
23	118982864
24	72
25	50
26	520
27	7560
28	42
29	2329089562800
30	15
31	72201776446800
32	1441440
33	99
34	9520
35	420
36	120
37	485721041551200
38	95760
39	468
40	24
41	19914562703599200

[1, 2, 6, 4, 60, 3, 140, 24, 9, 20, 27720, 4, 360360, 84, 10, 560, 12252240, 36, 77597520, 10, 21, 1320, 118982864, 72, 50, 520, 7560, 42, 2329089562800, 15, 72201776446800, 1441440, 99, 9520, 420, 120, 485721041551200, 95760, 468, 24, 19914562703599200]

cp's OEIS Frontend

A126262 a(n) is the denominator of the sum of the reciprocals of the positive integers k, k<=n, where every positive integer <= k and coprime to k is also coprime to n.

Table of values

List of values