A211306 - cp's OEIS frontend

A211306 Numerator of Sum_{k=1..n} 1/lambda(k), where lambda(k) is the Carmichael's lambda function.

n	a(n)
1	1
2	2
3	5
4	3
5	13
6	15
7	47
8	53
9	55
10	29
11	74
12	163
13	331
14	341
15	89
16	371
17	1499
18	513
19	4657
20	4837
21	4957
22	5029
23	55679
24	59639
25	12007
26	12139
27	12227
28	12491
29	87833
30	90605
31	454873
32	461803
33	467347
34	117703
35	59429
36	30292
37	121553
38	122323
39	61739
40	126943
41	254579
42	259199
43	259859

[1, 2, 5, 3, 13, 15, 47, 53, 55, 29, 74, 163, 331, 341, 89, 371, 1499, 513, 4657, 4837, 4957, 5029, 55679, 59639, 12007, 12139, 12227, 12491, 87833, 90605, 454873, 461803, 467347, 117703, 59429, 30292, 121553, 122323, 61739, 126943, 254579, 259199, 259859]

cp's OEIS Frontend

A211306 Numerator of Sum_{k=1..n} 1/lambda(k), where lambda(k) is the Carmichael's lambda function.

Table of values

List of values