A079893 - cp's OEIS frontend

A079893 a(n) = gcd(n, A079892(n)), where A079892(n) is the least number > n having one more distinct prime factor than n.

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

[1, 2, 3, 2, 1, 6, 1, 2, 1, 10, 1, 6, 1, 2, 15, 2, 1, 6, 1, 10, 3, 2, 1, 6, 1, 2, 1, 2, 1, 30, 1, 1, 3, 2, 7, 6, 1, 2, 3, 2, 1, 42, 1, 4, 15, 2, 1, 12, 1, 10, 3, 4, 1, 6, 5, 4, 3, 2, 1, 30, 1, 2, 3, 1, 1, 6, 1, 2, 1, 70, 1, 6, 1, 2, 3, 2, 1, 6, 1, 4, 1, 2, 1, 42, 5, 2, 3, 2, 1, 30, 1, 2, 3, 2, 1, 6, 1, 2, 3, 2]

cp's OEIS Frontend

A079893 a(n) = gcd(n, A079892(n)), where A079892(n) is the least number > n having one more distinct prime factor than n.

Table of values

List of values

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

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

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