A379946 - cp's OEIS frontend

A379946 Irregular triangle read by rows: T(n, k) is the denominator of the harmonic mean of all positive divisors of n except the k-th of them.

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

[1, 1, 1, 1, 3, 5, 3, 1, 1, 1, 1, 5, 11, 1, 1, 7, 11, 13, 7, 2, 5, 2, 4, 13, 8, 17, 1, 1, 4, 11, 2, 5, 13, 9, 1, 1, 5, 17, 11, 23, 1, 19, 7, 23, 15, 23, 27, 29, 15, 1, 1, 7, 1, 11, 2, 37, 19, 1, 1, 11, 8, 37, 19, 2, 41, 11, 25, 29, 31, 7, 25, 17, 35, 1, 1, 3, 2, 13, 9, 1, 19, 29, 59]

cp's OEIS Frontend

A379946 Irregular triangle read by rows: T(n, k) is the denominator of the harmonic mean of all positive divisors of n except the k-th of them.

Table of values

List of values

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

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

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