A036450 - cp's OEIS frontend

A036450 a(n) = d(d(d(n))), the 3rd iterate of the number-of-divisors function with an initial value of n.

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

[1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 2, 3, 2, 2, 2, 3, 2, 3, 2, 3, 2, 2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 3, 3, 2, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 2, 2, 4, 2, 2, 3, 2, 2, 3, 2, 3, 2, 3, 2, 4, 2, 2, 3, 3, 2, 3, 2, 3, 2, 2, 2, 4, 2, 2, 2, 3, 2, 4, 2, 3, 2, 2, 2, 4, 2, 3, 3, 2, 2, 3, 2, 3, 3]

cp's OEIS Frontend

A036450 a(n) = d(d(d(n))), the 3rd iterate of the number-of-divisors function with an initial value of n.

Table of values

List of values

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

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

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