A366780 - cp's OEIS frontend

A366780 Number of distinct prime divisors of A000073(n) (tribonacci numbers).

n	a(n)
2	0
3	0
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	3
14	2
15	3
16	2
17	3
18	1
19	3
20	4
21	3
22	3
23	2
24	2
25	2
26	3
27	3
28	3
29	5
30	3
31	4
32	5
33	3
34	4
35	3
36	5
37	4
38	5
39	3
40	5
41	3
42	2
43	4
44	2
45	4
46	5
47	4
48	4
49	6
50	2
51	5
52	5
53	6
54	3
55	5
56	7
57	5
58	2
59	3
60	5
61	4
62	6
63	5
64	4
65	7
66	3
67	2
68	4
69	4
70	3
71	3
72	4
73	5
74	2
75	6
76	6
77	6
78	5
79	3
80	6
81	5
82	4
83	2
84	6
85	3
86	6
87	1
88	7

[0, 0, 1, 1, 1, 1, 2, 2, 1, 1, 2, 3, 2, 3, 2, 3, 1, 3, 4, 3, 3, 2, 2, 2, 3, 3, 3, 5, 3, 4, 5, 3, 4, 3, 5, 4, 5, 3, 5, 3, 2, 4, 2, 4, 5, 4, 4, 6, 2, 5, 5, 6, 3, 5, 7, 5, 2, 3, 5, 4, 6, 5, 4, 7, 3, 2, 4, 4, 3, 3, 4, 5, 2, 6, 6, 6, 5, 3, 6, 5, 4, 2, 6, 3, 6, 1, 7]

cp's OEIS Frontend

A366780 Number of distinct prime divisors of A000073(n) (tribonacci numbers).

Table of values

List of values

n	a(n)
2	0
3	0
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	3
14	2
15	3
16	2
17	3
18	1
19	3
20	4
21	3
22	3
23	2
24	2
25	2
26	3
27	3
28	3
29	5
30	3
31	4
32	5
33	3
34	4
35	3
36	5
37	4
38	5
39	3
40	5
41	3
42	2
43	4
44	2
45	4
46	5
47	4
48	4
49	6
50	2
51	5
52	5
53	6
54	3
55	5
56	7
57	5
58	2
59	3
60	5
61	4
62	6
63	5
64	4
65	7
66	3
67	2
68	4
69	4
70	3
71	3
72	4
73	5
74	2
75	6
76	6
77	6
78	5
79	3
80	6
81	5
82	4
83	2
84	6
85	3
86	6
87	1
88	7

n	a(n)
2	0
3	0
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	3
14	2
15	3
16	2
17	3
18	1
19	3
20	4
21	3
22	3
23	2
24	2
25	2
26	3
27	3
28	3
29	5
30	3
31	4
32	5
33	3
34	4
35	3
36	5
37	4
38	5
39	3
40	5
41	3
42	2
43	4
44	2
45	4
46	5
47	4
48	4
49	6
50	2
51	5
52	5
53	6
54	3
55	5
56	7
57	5
58	2
59	3
60	5
61	4
62	6
63	5
64	4
65	7
66	3
67	2
68	4
69	4
70	3
71	3
72	4
73	5
74	2
75	6
76	6
77	6
78	5
79	3
80	6
81	5
82	4
83	2
84	6
85	3
86	6
87	1
88	7

n	a(n)
2	0
3	0
4	1
5	1
6	1
7	1
8	2
9	2
10	1
11	1
12	2
13	3
14	2
15	3
16	2
17	3
18	1
19	3
20	4
21	3
22	3
23	2
24	2
25	2
26	3
27	3
28	3
29	5
30	3
31	4
32	5
33	3
34	4
35	3
36	5
37	4
38	5
39	3
40	5
41	3
42	2
43	4
44	2
45	4
46	5
47	4
48	4
49	6
50	2
51	5
52	5
53	6
54	3
55	5
56	7
57	5
58	2
59	3
60	5
61	4
62	6
63	5
64	4
65	7
66	3
67	2
68	4
69	4
70	3
71	3
72	4
73	5
74	2
75	6
76	6
77	6
78	5
79	3
80	6
81	5
82	4
83	2
84	6
85	3
86	6
87	1
88	7