A132587 - cp's OEIS frontend

A132587 Let b(k) be the k-th term of the flattened irregular array where the m-th row contains the positive divisors of m. (b(k) = A027750(k).) Let c(k) be the k-th term of the flattened irregular array where the m-th row contains the positive integers that are <= m and are coprime to m. (c(k) = A038566(k).) Then a(n) = gcd(b(n),c(n)).

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

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

cp's OEIS Frontend

Table of values

List of values

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

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

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