A351551 - cp's OEIS frontend

A351551 Numbers k such that the largest unitary divisor of sigma(k) that is coprime with A003961(k) is also a unitary divisor of k.

n	a(n)
1	1
2	2
3	10
4	34
5	106
6	120
7	216
8	260
9	340
10	408
11	440
12	580
13	672
14	696
15	820
16	1060
17	1272
18	1666
19	1780
20	1940
21	2136
22	2340
23	2464
24	3320
25	3576
26	3960
27	4280
28	4536
29	5280
30	5380
31	5860
32	6456
33	6960
34	7520
35	8746
36	8840
37	9120
38	9632
39	10040
40	10776
41	12528
42	12640
43	13464
44	14560
45	16180
46	16660
47	17400
48	17620
49	19040
50	19416
51	19992
52	21320
53	22176
54	22968

[1, 2, 10, 34, 106, 120, 216, 260, 340, 408, 440, 580, 672, 696, 820, 1060, 1272, 1666, 1780, 1940, 2136, 2340, 2464, 3320, 3576, 3960, 4280, 4536, 5280, 5380, 5860, 6456, 6960, 7520, 8746, 8840, 9120, 9632, 10040, 10776, 12528, 12640, 13464, 14560, 16180, 16660, 17400, 17620, 19040, 19416, 19992, 21320, 22176, 22968]

cp's OEIS Frontend

A351551 Numbers k such that the largest unitary divisor of sigma(k) that is coprime with A003961(k) is also a unitary divisor of k.

Table of values

List of values