A233773 - cp's OEIS frontend

A233773 Triangle read by rows in which row n lists the proper divisors of n together with -n.

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

[-1, 1, -2, 1, -3, 1, 2, -4, 1, -5, 1, 2, 3, -6, 1, -7, 1, 2, 4, -8, 1, 3, -9, 1, 2, 5, -10, 1, -11, 1, 2, 3, 4, 6, -12, 1, -13, 1, 2, 7, -14, 1, 3, 5, -15, 1, 2, 4, 8, -16, 1, -17, 1, 2, 3, 6, 9, -18, 1, -19, 1, 2, 4, 5, 10, -20, 1, 3, 7, -21, 1, 2, 11, -22, 1, -23]

cp's OEIS Frontend

A233773 Triangle read by rows in which row n lists the proper divisors of n together with -n.

Table of values

List of values

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

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

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