A325651 - cp's OEIS frontend

A325651 a(n) = greatest k such that sigma(k) = sigma(n).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	11
7	7
8	8
9	9
10	17
11	11
12	12
13	13
14	23
15	23
16	25
17	17
18	18
19	19
20	41
21	31
22	22
23	23
24	59
25	25
26	41
27	27
28	39
29	29
30	71
31	31
32	32
33	47
34	53
35	47
36	36
37	37
38	59
39	39
40	89
41	41
42	77
43	43
44	83
45	45
46	71
47	47
48	75
49	49
50	50
51	71
52	97
53	53
54	95
55	71
56	95
57	79
58	89
59	59
60	167
61	61
62	77
63	103
64	64
65	83
66	119

[1, 2, 3, 4, 5, 11, 7, 8, 9, 17, 11, 12, 13, 23, 23, 25, 17, 18, 19, 41, 31, 22, 23, 59, 25, 41, 27, 39, 29, 71, 31, 32, 47, 53, 47, 36, 37, 59, 39, 89, 41, 77, 43, 83, 45, 71, 47, 75, 49, 50, 71, 97, 53, 95, 71, 95, 79, 89, 59, 167, 61, 77, 103, 64, 83, 119]

cp's OEIS Frontend

A325651 a(n) = greatest k such that sigma(k) = sigma(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	11
7	7
8	8
9	9
10	17
11	11
12	12
13	13
14	23
15	23
16	25
17	17
18	18
19	19
20	41
21	31
22	22
23	23
24	59
25	25
26	41
27	27
28	39
29	29
30	71
31	31
32	32
33	47
34	53
35	47
36	36
37	37
38	59
39	39
40	89
41	41
42	77
43	43
44	83
45	45
46	71
47	47
48	75
49	49
50	50
51	71
52	97
53	53
54	95
55	71
56	95
57	79
58	89
59	59
60	167
61	61
62	77
63	103
64	64
65	83
66	119

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	11
7	7
8	8
9	9
10	17
11	11
12	12
13	13
14	23
15	23
16	25
17	17
18	18
19	19
20	41
21	31
22	22
23	23
24	59
25	25
26	41
27	27
28	39
29	29
30	71
31	31
32	32
33	47
34	53
35	47
36	36
37	37
38	59
39	39
40	89
41	41
42	77
43	43
44	83
45	45
46	71
47	47
48	75
49	49
50	50
51	71
52	97
53	53
54	95
55	71
56	95
57	79
58	89
59	59
60	167
61	61
62	77
63	103
64	64
65	83
66	119

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	11
7	7
8	8
9	9
10	17
11	11
12	12
13	13
14	23
15	23
16	25
17	17
18	18
19	19
20	41
21	31
22	22
23	23
24	59
25	25
26	41
27	27
28	39
29	29
30	71
31	31
32	32
33	47
34	53
35	47
36	36
37	37
38	59
39	39
40	89
41	41
42	77
43	43
44	83
45	45
46	71
47	47
48	75
49	49
50	50
51	71
52	97
53	53
54	95
55	71
56	95
57	79
58	89
59	59
60	167
61	61
62	77
63	103
64	64
65	83
66	119