A235671 - cp's OEIS frontend

A235671 Triangle read by rows in which row n lists the proper divisors of n in increasing order, 2n, and the proper divisors of n in decreasing order.

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

[2, 1, 4, 1, 1, 6, 1, 1, 2, 8, 2, 1, 1, 10, 1, 1, 2, 3, 12, 3, 2, 1, 1, 14, 1, 1, 2, 4, 16, 4, 2, 1, 1, 3, 18, 3, 1, 1, 2, 5, 20, 5, 2, 1, 1, 22, 1, 1, 2, 3, 4, 6, 24, 6, 4, 3, 2, 1, 1, 26, 1, 1, 2, 7, 28, 7, 2, 1, 1, 3, 5, 30, 5, 3, 1, 1, 2, 4, 8, 32, 8, 4, 2, 1]

cp's OEIS Frontend

A235671 Triangle read by rows in which row n lists the proper divisors of n in increasing order, 2n, and the proper divisors of n in decreasing order.

Table of values

List of values

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

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

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