A256440 - cp's OEIS frontend

A256440 Regular triangle where the n-th row lists the integers k between 1 and n ordered by increasing value of sigma(k)/k where sigma is the sum of divisors, A000203.

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	1
8	3
9	2
10	4
11	1
12	5
13	3
14	2
15	4
16	1
17	5
18	3
19	2
20	4
21	6
22	1
23	7
24	5
25	3
26	2
27	4
28	6
29	1
30	7
31	5
32	3
33	2
34	4
35	8
36	6
37	1
38	7
39	5
40	3
41	9
42	2
43	4
44	8
45	6
46	1
47	7
48	5
49	3
50	9
51	2
52	4
53	10
54	8
55	6
56	1
57	11
58	7
59	5
60	3
61	9
62	2
63	4
64	10
65	8
66	6
67	1
68	11
69	7
70	5
71	3
72	9
73	2
74	4
75	10
76	8
77	6
78	12
79	1
80	13
81	11
82	7
83	5
84	3
85	9
86	2
87	4
88	10
89	8
90	6
91	12

[1, 1, 2, 1, 3, 2, 1, 3, 2, 4, 1, 5, 3, 2, 4, 1, 5, 3, 2, 4, 6, 1, 7, 5, 3, 2, 4, 6, 1, 7, 5, 3, 2, 4, 8, 6, 1, 7, 5, 3, 9, 2, 4, 8, 6, 1, 7, 5, 3, 9, 2, 4, 10, 8, 6, 1, 11, 7, 5, 3, 9, 2, 4, 10, 8, 6, 1, 11, 7, 5, 3, 9, 2, 4, 10, 8, 6, 12, 1, 13, 11, 7, 5, 3, 9, 2, 4, 10, 8, 6, 12]

cp's OEIS Frontend

A256440 Regular triangle where the n-th row lists the integers k between 1 and n ordered by increasing value of sigma(k)/k where sigma is the sum of divisors, A000203.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	1
8	3
9	2
10	4
11	1
12	5
13	3
14	2
15	4
16	1
17	5
18	3
19	2
20	4
21	6
22	1
23	7
24	5
25	3
26	2
27	4
28	6
29	1
30	7
31	5
32	3
33	2
34	4
35	8
36	6
37	1
38	7
39	5
40	3
41	9
42	2
43	4
44	8
45	6
46	1
47	7
48	5
49	3
50	9
51	2
52	4
53	10
54	8
55	6
56	1
57	11
58	7
59	5
60	3
61	9
62	2
63	4
64	10
65	8
66	6
67	1
68	11
69	7
70	5
71	3
72	9
73	2
74	4
75	10
76	8
77	6
78	12
79	1
80	13
81	11
82	7
83	5
84	3
85	9
86	2
87	4
88	10
89	8
90	6
91	12

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	1
8	3
9	2
10	4
11	1
12	5
13	3
14	2
15	4
16	1
17	5
18	3
19	2
20	4
21	6
22	1
23	7
24	5
25	3
26	2
27	4
28	6
29	1
30	7
31	5
32	3
33	2
34	4
35	8
36	6
37	1
38	7
39	5
40	3
41	9
42	2
43	4
44	8
45	6
46	1
47	7
48	5
49	3
50	9
51	2
52	4
53	10
54	8
55	6
56	1
57	11
58	7
59	5
60	3
61	9
62	2
63	4
64	10
65	8
66	6
67	1
68	11
69	7
70	5
71	3
72	9
73	2
74	4
75	10
76	8
77	6
78	12
79	1
80	13
81	11
82	7
83	5
84	3
85	9
86	2
87	4
88	10
89	8
90	6
91	12

n	a(n)
1	1
2	1
3	2
4	1
5	3
6	2
7	1
8	3
9	2
10	4
11	1
12	5
13	3
14	2
15	4
16	1
17	5
18	3
19	2
20	4
21	6
22	1
23	7
24	5
25	3
26	2
27	4
28	6
29	1
30	7
31	5
32	3
33	2
34	4
35	8
36	6
37	1
38	7
39	5
40	3
41	9
42	2
43	4
44	8
45	6
46	1
47	7
48	5
49	3
50	9
51	2
52	4
53	10
54	8
55	6
56	1
57	11
58	7
59	5
60	3
61	9
62	2
63	4
64	10
65	8
66	6
67	1
68	11
69	7
70	5
71	3
72	9
73	2
74	4
75	10
76	8
77	6
78	12
79	1
80	13
81	11
82	7
83	5
84	3
85	9
86	2
87	4
88	10
89	8
90	6
91	12