A102445 - cp's OEIS frontend

A102445 Number of prime divisors (counted with multiplicity) of the central trinomial coefficients (A002426).

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	2
7	2
8	4
9	2
10	2
11	3
12	2
13	2
14	4
15	3
16	4
17	6
18	3
19	2
20	3
21	3
22	5
23	6
24	6
25	4
26	9
27	3
28	3
29	2
30	3
31	3
32	4
33	5
34	3
35	5
36	4
37	2
38	3
39	3
40	4
41	2
42	7
43	5
44	7
45	7
46	5
47	5
48	6
49	6
50	4
51	5
52	8
53	9
54	4
55	5
56	6
57	3
58	3
59	7
60	6
61	8
62	7
63	7
64	4
65	5
66	4
67	4
68	7
69	7
70	9
71	11
72	5
73	8
74	7
75	7
76	6
77	7
78	7
79	8
80	12
81	4
82	7
83	6
84	6
85	4
86	8
87	7
88	4
89	10
90	7
91	7
92	6
93	6
94	7
95	5
96	5
97	6
98	8
99	7
100	9
101	10
102	5
103	7

[0, 1, 1, 1, 2, 2, 2, 4, 2, 2, 3, 2, 2, 4, 3, 4, 6, 3, 2, 3, 3, 5, 6, 6, 4, 9, 3, 3, 2, 3, 3, 4, 5, 3, 5, 4, 2, 3, 3, 4, 2, 7, 5, 7, 7, 5, 5, 6, 6, 4, 5, 8, 9, 4, 5, 6, 3, 3, 7, 6, 8, 7, 7, 4, 5, 4, 4, 7, 7, 9, 11, 5, 8, 7, 7, 6, 7, 7, 8, 12, 4, 7, 6, 6, 4, 8, 7, 4, 10, 7, 7, 6, 6, 7, 5, 5, 6, 8, 7, 9, 10, 5, 7]

cp's OEIS Frontend

A102445 Number of prime divisors (counted with multiplicity) of the central trinomial coefficients (A002426).

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	2
7	2
8	4
9	2
10	2
11	3
12	2
13	2
14	4
15	3
16	4
17	6
18	3
19	2
20	3
21	3
22	5
23	6
24	6
25	4
26	9
27	3
28	3
29	2
30	3
31	3
32	4
33	5
34	3
35	5
36	4
37	2
38	3
39	3
40	4
41	2
42	7
43	5
44	7
45	7
46	5
47	5
48	6
49	6
50	4
51	5
52	8
53	9
54	4
55	5
56	6
57	3
58	3
59	7
60	6
61	8
62	7
63	7
64	4
65	5
66	4
67	4
68	7
69	7
70	9
71	11
72	5
73	8
74	7
75	7
76	6
77	7
78	7
79	8
80	12
81	4
82	7
83	6
84	6
85	4
86	8
87	7
88	4
89	10
90	7
91	7
92	6
93	6
94	7
95	5
96	5
97	6
98	8
99	7
100	9
101	10
102	5
103	7

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	2
7	2
8	4
9	2
10	2
11	3
12	2
13	2
14	4
15	3
16	4
17	6
18	3
19	2
20	3
21	3
22	5
23	6
24	6
25	4
26	9
27	3
28	3
29	2
30	3
31	3
32	4
33	5
34	3
35	5
36	4
37	2
38	3
39	3
40	4
41	2
42	7
43	5
44	7
45	7
46	5
47	5
48	6
49	6
50	4
51	5
52	8
53	9
54	4
55	5
56	6
57	3
58	3
59	7
60	6
61	8
62	7
63	7
64	4
65	5
66	4
67	4
68	7
69	7
70	9
71	11
72	5
73	8
74	7
75	7
76	6
77	7
78	7
79	8
80	12
81	4
82	7
83	6
84	6
85	4
86	8
87	7
88	4
89	10
90	7
91	7
92	6
93	6
94	7
95	5
96	5
97	6
98	8
99	7
100	9
101	10
102	5
103	7

n	a(n)
1	0
2	1
3	1
4	1
5	2
6	2
7	2
8	4
9	2
10	2
11	3
12	2
13	2
14	4
15	3
16	4
17	6
18	3
19	2
20	3
21	3
22	5
23	6
24	6
25	4
26	9
27	3
28	3
29	2
30	3
31	3
32	4
33	5
34	3
35	5
36	4
37	2
38	3
39	3
40	4
41	2
42	7
43	5
44	7
45	7
46	5
47	5
48	6
49	6
50	4
51	5
52	8
53	9
54	4
55	5
56	6
57	3
58	3
59	7
60	6
61	8
62	7
63	7
64	4
65	5
66	4
67	4
68	7
69	7
70	9
71	11
72	5
73	8
74	7
75	7
76	6
77	7
78	7
79	8
80	12
81	4
82	7
83	6
84	6
85	4
86	8
87	7
88	4
89	10
90	7
91	7
92	6
93	6
94	7
95	5
96	5
97	6
98	8
99	7
100	9
101	10
102	5
103	7