A352337 - cp's OEIS frontend

A352337 Numbers m such that A_m(j) = 1 for some value of j, where A_m(k+1) = 2*A_m(k) - sigma(A_m(k)), sigma(m) = sum of the divisors of m, and A_m(1) = m.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	8
7	9
8	10
9	11
10	14
11	16
12	17
13	21
14	22
15	23
16	26
17	27
18	32
19	34
20	35
21	38
22	39
23	44
24	55
25	57
26	58
27	59
28	63
29	64
30	68
31	74
32	75
33	77
34	82
35	83
36	92
37	93
38	94
39	110
40	116
41	119
42	122
43	125
44	128
45	129
46	130
47	131
48	134
49	136
50	137
51	142
52	145
53	152
54	161
55	164
56	170
57	171
58	184
59	185
60	189
61	194

[1, 2, 3, 4, 5, 8, 9, 10, 11, 14, 16, 17, 21, 22, 23, 26, 27, 32, 34, 35, 38, 39, 44, 55, 57, 58, 59, 63, 64, 68, 74, 75, 77, 82, 83, 92, 93, 94, 110, 116, 119, 122, 125, 128, 129, 130, 131, 134, 136, 137, 142, 145, 152, 161, 164, 170, 171, 184, 185, 189, 194]

cp's OEIS Frontend

A352337 Numbers m such that A_m(j) = 1 for some value of j, where A_m(k+1) = 2*A_m(k) - sigma(A_m(k)), sigma(m) = sum of the divisors of m, and A_m(1) = m.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	8
7	9
8	10
9	11
10	14
11	16
12	17
13	21
14	22
15	23
16	26
17	27
18	32
19	34
20	35
21	38
22	39
23	44
24	55
25	57
26	58
27	59
28	63
29	64
30	68
31	74
32	75
33	77
34	82
35	83
36	92
37	93
38	94
39	110
40	116
41	119
42	122
43	125
44	128
45	129
46	130
47	131
48	134
49	136
50	137
51	142
52	145
53	152
54	161
55	164
56	170
57	171
58	184
59	185
60	189
61	194

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	8
7	9
8	10
9	11
10	14
11	16
12	17
13	21
14	22
15	23
16	26
17	27
18	32
19	34
20	35
21	38
22	39
23	44
24	55
25	57
26	58
27	59
28	63
29	64
30	68
31	74
32	75
33	77
34	82
35	83
36	92
37	93
38	94
39	110
40	116
41	119
42	122
43	125
44	128
45	129
46	130
47	131
48	134
49	136
50	137
51	142
52	145
53	152
54	161
55	164
56	170
57	171
58	184
59	185
60	189
61	194

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	8
7	9
8	10
9	11
10	14
11	16
12	17
13	21
14	22
15	23
16	26
17	27
18	32
19	34
20	35
21	38
22	39
23	44
24	55
25	57
26	58
27	59
28	63
29	64
30	68
31	74
32	75
33	77
34	82
35	83
36	92
37	93
38	94
39	110
40	116
41	119
42	122
43	125
44	128
45	129
46	130
47	131
48	134
49	136
50	137
51	142
52	145
53	152
54	161
55	164
56	170
57	171
58	184
59	185
60	189
61	194