A360736 - cp's OEIS frontend

A360736 Number of prime divisors of A007942(n) = decimal concatenation of sequence (n, n-1, ..., 2, 1, 2, ..., n-1, n) counted with multiplicity.

n	a(n)
1	0
2	3
3	3
4	2
5	5
6	8
7	3
8	4
9	3
10	3
11	3
12	5
13	1
14	4
15	6
16	3
17	2
18	3
19	4
20	11
21	4
22	8
23	2
24	4
25	5
26	6
27	5
28	9
29	5
30	6
31	6
32	4
33	5
34	7
35	4
36	8
37	8
38	5
39	7
40	7
41	3
42	3
43	7
44	9
45	7
46	7
47	10
48	8
49	6
50	7
51	7
52	10
53	5
54	5

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

cp's OEIS Frontend

A360736 Number of prime divisors of A007942(n) = decimal concatenation of sequence (n, n-1, ..., 2, 1, 2, ..., n-1, n) counted with multiplicity.

Table of values

List of values

n	a(n)
1	0
2	3
3	3
4	2
5	5
6	8
7	3
8	4
9	3
10	3
11	3
12	5
13	1
14	4
15	6
16	3
17	2
18	3
19	4
20	11
21	4
22	8
23	2
24	4
25	5
26	6
27	5
28	9
29	5
30	6
31	6
32	4
33	5
34	7
35	4
36	8
37	8
38	5
39	7
40	7
41	3
42	3
43	7
44	9
45	7
46	7
47	10
48	8
49	6
50	7
51	7
52	10
53	5
54	5

n	a(n)
1	0
2	3
3	3
4	2
5	5
6	8
7	3
8	4
9	3
10	3
11	3
12	5
13	1
14	4
15	6
16	3
17	2
18	3
19	4
20	11
21	4
22	8
23	2
24	4
25	5
26	6
27	5
28	9
29	5
30	6
31	6
32	4
33	5
34	7
35	4
36	8
37	8
38	5
39	7
40	7
41	3
42	3
43	7
44	9
45	7
46	7
47	10
48	8
49	6
50	7
51	7
52	10
53	5
54	5

n	a(n)
1	0
2	3
3	3
4	2
5	5
6	8
7	3
8	4
9	3
10	3
11	3
12	5
13	1
14	4
15	6
16	3
17	2
18	3
19	4
20	11
21	4
22	8
23	2
24	4
25	5
26	6
27	5
28	9
29	5
30	6
31	6
32	4
33	5
34	7
35	4
36	8
37	8
38	5
39	7
40	7
41	3
42	3
43	7
44	9
45	7
46	7
47	10
48	8
49	6
50	7
51	7
52	10
53	5
54	5