A073932 - cp's OEIS frontend

A073932 Define f(n) = n - largest nontrivial divisor of n or f(n) = n-1 if n is a prime [that is, f(n) = A060681(n)]. Form a triangle in which the n-th row contains terms n, f(n), f(f(n)), ... until a 1 is reached; sequence gives triangle read by rows.

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

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

cp's OEIS Frontend

A073932 Define f(n) = n - largest nontrivial divisor of n or f(n) = n-1 if n is a prime [that is, f(n) = A060681(n)]. Form a triangle in which the n-th row contains terms n, f(n), f(f(n)), ... until a 1 is reached; sequence gives triangle read by rows.

Table of values

List of values

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

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

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