A280348 - cp's OEIS frontend

A280348 Irregular triangle read by rows in which row n lists the divisors of the sum of the divisors of n.

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	7
9	1
10	2
11	3
12	6
13	1
14	2
15	3
16	4
17	6
18	12
19	1
20	2
21	4
22	8
23	1
24	3
25	5
26	15
27	1
28	13
29	1
30	2
31	3
32	6
33	9
34	18
35	1
36	2
37	3
38	4
39	6
40	12
41	1
42	2
43	4
44	7
45	14
46	28
47	1
48	2
49	7
50	14
51	1
52	2
53	3
54	4
55	6
56	8
57	12
58	24
59	1
60	2
61	3
62	4
63	6
64	8
65	12
66	24
67	1
68	31
69	1
70	2
71	3
72	6
73	9
74	18
75	1
76	3
77	13
78	39
79	1
80	2
81	4
82	5
83	10
84	20
85	1
86	2
87	3
88	6
89	7
90	14
91	21
92	42
93	1
94	2
95	4
96	8
97	16
98	32
99	1
100	2
101	3
102	4
103	6
104	9
105	12
106	18
107	36

[1, 1, 3, 1, 2, 4, 1, 7, 1, 2, 3, 6, 1, 2, 3, 4, 6, 12, 1, 2, 4, 8, 1, 3, 5, 15, 1, 13, 1, 2, 3, 6, 9, 18, 1, 2, 3, 4, 6, 12, 1, 2, 4, 7, 14, 28, 1, 2, 7, 14, 1, 2, 3, 4, 6, 8, 12, 24, 1, 2, 3, 4, 6, 8, 12, 24, 1, 31, 1, 2, 3, 6, 9, 18, 1, 3, 13, 39, 1, 2, 4, 5, 10, 20, 1, 2, 3, 6, 7, 14, 21, 42, 1, 2, 4, 8, 16, 32, 1, 2, 3, 4, 6, 9, 12, 18, 36]

cp's OEIS Frontend

A280348 Irregular triangle read by rows in which row n lists the divisors of the sum of the divisors of n.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	7
9	1
10	2
11	3
12	6
13	1
14	2
15	3
16	4
17	6
18	12
19	1
20	2
21	4
22	8
23	1
24	3
25	5
26	15
27	1
28	13
29	1
30	2
31	3
32	6
33	9
34	18
35	1
36	2
37	3
38	4
39	6
40	12
41	1
42	2
43	4
44	7
45	14
46	28
47	1
48	2
49	7
50	14
51	1
52	2
53	3
54	4
55	6
56	8
57	12
58	24
59	1
60	2
61	3
62	4
63	6
64	8
65	12
66	24
67	1
68	31
69	1
70	2
71	3
72	6
73	9
74	18
75	1
76	3
77	13
78	39
79	1
80	2
81	4
82	5
83	10
84	20
85	1
86	2
87	3
88	6
89	7
90	14
91	21
92	42
93	1
94	2
95	4
96	8
97	16
98	32
99	1
100	2
101	3
102	4
103	6
104	9
105	12
106	18
107	36

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	7
9	1
10	2
11	3
12	6
13	1
14	2
15	3
16	4
17	6
18	12
19	1
20	2
21	4
22	8
23	1
24	3
25	5
26	15
27	1
28	13
29	1
30	2
31	3
32	6
33	9
34	18
35	1
36	2
37	3
38	4
39	6
40	12
41	1
42	2
43	4
44	7
45	14
46	28
47	1
48	2
49	7
50	14
51	1
52	2
53	3
54	4
55	6
56	8
57	12
58	24
59	1
60	2
61	3
62	4
63	6
64	8
65	12
66	24
67	1
68	31
69	1
70	2
71	3
72	6
73	9
74	18
75	1
76	3
77	13
78	39
79	1
80	2
81	4
82	5
83	10
84	20
85	1
86	2
87	3
88	6
89	7
90	14
91	21
92	42
93	1
94	2
95	4
96	8
97	16
98	32
99	1
100	2
101	3
102	4
103	6
104	9
105	12
106	18
107	36

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	7
9	1
10	2
11	3
12	6
13	1
14	2
15	3
16	4
17	6
18	12
19	1
20	2
21	4
22	8
23	1
24	3
25	5
26	15
27	1
28	13
29	1
30	2
31	3
32	6
33	9
34	18
35	1
36	2
37	3
38	4
39	6
40	12
41	1
42	2
43	4
44	7
45	14
46	28
47	1
48	2
49	7
50	14
51	1
52	2
53	3
54	4
55	6
56	8
57	12
58	24
59	1
60	2
61	3
62	4
63	6
64	8
65	12
66	24
67	1
68	31
69	1
70	2
71	3
72	6
73	9
74	18
75	1
76	3
77	13
78	39
79	1
80	2
81	4
82	5
83	10
84	20
85	1
86	2
87	3
88	6
89	7
90	14
91	21
92	42
93	1
94	2
95	4
96	8
97	16
98	32
99	1
100	2
101	3
102	4
103	6
104	9
105	12
106	18
107	36