A226871 - cp's OEIS frontend

A226871 Triangle read by rows: row n gives the first q divisors d(1), d(2), ..., d(q) of A225110(n) such that Sum_{i = 1..q} 1/d(i) is an integer.

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	1
7	2
8	3
9	6
10	1
11	2
12	4
13	7
14	14
15	28
16	1
17	2
18	3
19	6
20	1
21	2
22	3
23	6
24	1
25	2
26	3
27	6
28	1
29	2
30	3
31	6
32	1
33	2
34	3
35	6
36	1
37	2
38	3
39	6
40	1
41	2
42	3
43	4
44	5
45	6
46	8
47	10
48	12
49	15
50	20
51	24
52	30
53	40
54	60
55	120
56	1
57	2
58	3
59	6
60	1
61	2
62	3
63	6
64	1
65	2
66	3
67	6
68	1
69	2
70	3
71	6
72	1
73	2
74	3
75	4
76	5
77	6
78	9
79	10
80	12
81	15
82	18

[1, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 4, 7, 14, 28, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 6, 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18]

cp's OEIS Frontend

A226871 Triangle read by rows: row n gives the first q divisors d(1), d(2), ..., d(q) of A225110(n) such that Sum_{i = 1..q} 1/d(i) is an integer.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	1
7	2
8	3
9	6
10	1
11	2
12	4
13	7
14	14
15	28
16	1
17	2
18	3
19	6
20	1
21	2
22	3
23	6
24	1
25	2
26	3
27	6
28	1
29	2
30	3
31	6
32	1
33	2
34	3
35	6
36	1
37	2
38	3
39	6
40	1
41	2
42	3
43	4
44	5
45	6
46	8
47	10
48	12
49	15
50	20
51	24
52	30
53	40
54	60
55	120
56	1
57	2
58	3
59	6
60	1
61	2
62	3
63	6
64	1
65	2
66	3
67	6
68	1
69	2
70	3
71	6
72	1
73	2
74	3
75	4
76	5
77	6
78	9
79	10
80	12
81	15
82	18

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	1
7	2
8	3
9	6
10	1
11	2
12	4
13	7
14	14
15	28
16	1
17	2
18	3
19	6
20	1
21	2
22	3
23	6
24	1
25	2
26	3
27	6
28	1
29	2
30	3
31	6
32	1
33	2
34	3
35	6
36	1
37	2
38	3
39	6
40	1
41	2
42	3
43	4
44	5
45	6
46	8
47	10
48	12
49	15
50	20
51	24
52	30
53	40
54	60
55	120
56	1
57	2
58	3
59	6
60	1
61	2
62	3
63	6
64	1
65	2
66	3
67	6
68	1
69	2
70	3
71	6
72	1
73	2
74	3
75	4
76	5
77	6
78	9
79	10
80	12
81	15
82	18

n	a(n)
1	1
2	1
3	2
4	3
5	6
6	1
7	2
8	3
9	6
10	1
11	2
12	4
13	7
14	14
15	28
16	1
17	2
18	3
19	6
20	1
21	2
22	3
23	6
24	1
25	2
26	3
27	6
28	1
29	2
30	3
31	6
32	1
33	2
34	3
35	6
36	1
37	2
38	3
39	6
40	1
41	2
42	3
43	4
44	5
45	6
46	8
47	10
48	12
49	15
50	20
51	24
52	30
53	40
54	60
55	120
56	1
57	2
58	3
59	6
60	1
61	2
62	3
63	6
64	1
65	2
66	3
67	6
68	1
69	2
70	3
71	6
72	1
73	2
74	3
75	4
76	5
77	6
78	9
79	10
80	12
81	15
82	18