A032451 - cp's OEIS frontend

A032451 Irregular triangle read by rows: there is a row for each value of n for which the aliquot sequence starting at n eventually reaches 1, giving the part of the sequence from n to 1.

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

[1, 2, 1, 3, 1, 4, 3, 1, 5, 1, 7, 1, 8, 7, 1, 9, 4, 3, 1, 10, 8, 7, 1, 11, 1, 12, 16, 15, 9, 4, 3, 1, 13, 1, 14, 10, 8, 7, 1, 15, 9, 4, 3, 1, 16, 15, 9, 4, 3, 1, 17, 1, 18, 21, 11, 1, 19, 1, 20, 22, 14, 10, 8, 7, 1, 21, 11, 1, 22, 14, 10, 8, 7, 1, 23, 1, 24, 36, 55, 17, 1, 26, 16]

cp's OEIS Frontend

A032451 Irregular triangle read by rows: there is a row for each value of n for which the aliquot sequence starting at n eventually reaches 1, giving the part of the sequence from n to 1.

Table of values

List of values

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

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

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