A231571 - cp's OEIS frontend

A231571 Composite numbers n such that lambda(n) divides 4n-4, where lambda is the Carmichael lambda function (A002322).

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	15
7	16
8	20
9	24
10	28
11	30
12	40
13	48
14	52
15	60
16	66
17	70
18	80
19	85
20	91
21	112
22	120
23	130
24	176
25	190
26	208
27	232
28	240
29	276
30	280
31	286
32	364
33	370
34	435
35	451
36	496
37	520
38	532
39	561
40	616
41	703
42	742
43	910
44	946
45	976
46	1036
47	1105
48	1128
49	1288
50	1387
51	1456
52	1729
53	1770
54	1891

[4, 6, 8, 10, 12, 15, 16, 20, 24, 28, 30, 40, 48, 52, 60, 66, 70, 80, 85, 91, 112, 120, 130, 176, 190, 208, 232, 240, 276, 280, 286, 364, 370, 435, 451, 496, 520, 532, 561, 616, 703, 742, 910, 946, 976, 1036, 1105, 1128, 1288, 1387, 1456, 1729, 1770, 1891]

cp's OEIS Frontend

A231571 Composite numbers n such that lambda(n) divides 4n-4, where lambda is the Carmichael lambda function (A002322).

Table of values

List of values