A063973 - cp's OEIS frontend

A063973 a(n) is the largest m such that usigma(m) = n (or 0 if no such m).

n	a(n)
1	1
2	0
3	2
4	3
5	4
6	5
7	0
8	7
9	8
10	9
11	0
12	11
13	0
14	13
15	0
16	0
17	16
18	17
19	0
20	19
21	0
22	0
23	0
24	23
25	0
26	25
27	0
28	27
29	0
30	29
31	0
32	31
33	32
34	0
35	0
36	24
37	0
38	37
39	0
40	28
41	0
42	41
43	0
44	43
45	0
46	0
47	0
48	47
49	0
50	49
51	0
52	0
53	0
54	53
55	0
56	39
57	0
58	0
59	0
60	59
61	0
62	61
63	0
64	0
65	64
66	0
67	0
68	67
69	0
70	52
71	0
72	71
73	0
74	73
75	0
76	0
77	0
78	50
79	0
80	79
81	0
82	81
83	0
84	83
85	0
86	0
87	0
88	0

[1, 0, 2, 3, 4, 5, 0, 7, 8, 9, 0, 11, 0, 13, 0, 0, 16, 17, 0, 19, 0, 0, 0, 23, 0, 25, 0, 27, 0, 29, 0, 31, 32, 0, 0, 24, 0, 37, 0, 28, 0, 41, 0, 43, 0, 0, 0, 47, 0, 49, 0, 0, 0, 53, 0, 39, 0, 0, 0, 59, 0, 61, 0, 0, 64, 0, 0, 67, 0, 52, 0, 71, 0, 73, 0, 0, 0, 50, 0, 79, 0, 81, 0, 83, 0, 0, 0, 0]

cp's OEIS Frontend

A063973 a(n) is the largest m such that usigma(m) = n (or 0 if no such m).

Table of values

List of values

n	a(n)
1	1
2	0
3	2
4	3
5	4
6	5
7	0
8	7
9	8
10	9
11	0
12	11
13	0
14	13
15	0
16	0
17	16
18	17
19	0
20	19
21	0
22	0
23	0
24	23
25	0
26	25
27	0
28	27
29	0
30	29
31	0
32	31
33	32
34	0
35	0
36	24
37	0
38	37
39	0
40	28
41	0
42	41
43	0
44	43
45	0
46	0
47	0
48	47
49	0
50	49
51	0
52	0
53	0
54	53
55	0
56	39
57	0
58	0
59	0
60	59
61	0
62	61
63	0
64	0
65	64
66	0
67	0
68	67
69	0
70	52
71	0
72	71
73	0
74	73
75	0
76	0
77	0
78	50
79	0
80	79
81	0
82	81
83	0
84	83
85	0
86	0
87	0
88	0

n	a(n)
1	1
2	0
3	2
4	3
5	4
6	5
7	0
8	7
9	8
10	9
11	0
12	11
13	0
14	13
15	0
16	0
17	16
18	17
19	0
20	19
21	0
22	0
23	0
24	23
25	0
26	25
27	0
28	27
29	0
30	29
31	0
32	31
33	32
34	0
35	0
36	24
37	0
38	37
39	0
40	28
41	0
42	41
43	0
44	43
45	0
46	0
47	0
48	47
49	0
50	49
51	0
52	0
53	0
54	53
55	0
56	39
57	0
58	0
59	0
60	59
61	0
62	61
63	0
64	0
65	64
66	0
67	0
68	67
69	0
70	52
71	0
72	71
73	0
74	73
75	0
76	0
77	0
78	50
79	0
80	79
81	0
82	81
83	0
84	83
85	0
86	0
87	0
88	0

n	a(n)
1	1
2	0
3	2
4	3
5	4
6	5
7	0
8	7
9	8
10	9
11	0
12	11
13	0
14	13
15	0
16	0
17	16
18	17
19	0
20	19
21	0
22	0
23	0
24	23
25	0
26	25
27	0
28	27
29	0
30	29
31	0
32	31
33	32
34	0
35	0
36	24
37	0
38	37
39	0
40	28
41	0
42	41
43	0
44	43
45	0
46	0
47	0
48	47
49	0
50	49
51	0
52	0
53	0
54	53
55	0
56	39
57	0
58	0
59	0
60	59
61	0
62	61
63	0
64	0
65	64
66	0
67	0
68	67
69	0
70	52
71	0
72	71
73	0
74	73
75	0
76	0
77	0
78	50
79	0
80	79
81	0
82	81
83	0
84	83
85	0
86	0
87	0
88	0