A284260 - cp's OEIS frontend

A284260 Greatest prime dividing n which is less than A020639(n)^2, where A020639(n) is the smallest prime dividing n, a(1) = 1.

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	3
10	2
11	11
12	3
13	13
14	2
15	5
16	2
17	17
18	3
19	19
20	2
21	7
22	2
23	23
24	3
25	5
26	2
27	3
28	2
29	29
30	3
31	31
32	2
33	3
34	2
35	7
36	3
37	37
38	2
39	3
40	2
41	41
42	3
43	43
44	2
45	5
46	2
47	47
48	3
49	7
50	2
51	3
52	2
53	53
54	3
55	11
56	2
57	3
58	2
59	59
60	3
61	61
62	2
63	7
64	2
65	13
66	3
67	67
68	2
69	3
70	2
71	71
72	3
73	73
74	2
75	5
76	2
77	11
78	3
79	79
80	2
81	3
82	2
83	83
84	3
85	17
86	2
87	3
88	2
89	89
90	3
91	13
92	2
93	3
94	2
95	19
96	3
97	97
98	2
99	3
100	2
101	101
102	3
103	103
104	2
105	7
106	2
107	107
108	3
109	109

[1, 2, 3, 2, 5, 3, 7, 2, 3, 2, 11, 3, 13, 2, 5, 2, 17, 3, 19, 2, 7, 2, 23, 3, 5, 2, 3, 2, 29, 3, 31, 2, 3, 2, 7, 3, 37, 2, 3, 2, 41, 3, 43, 2, 5, 2, 47, 3, 7, 2, 3, 2, 53, 3, 11, 2, 3, 2, 59, 3, 61, 2, 7, 2, 13, 3, 67, 2, 3, 2, 71, 3, 73, 2, 5, 2, 11, 3, 79, 2, 3, 2, 83, 3, 17, 2, 3, 2, 89, 3, 13, 2, 3, 2, 19, 3, 97, 2, 3, 2, 101, 3, 103, 2, 7, 2, 107, 3, 109]

cp's OEIS Frontend

A284260 Greatest prime dividing n which is less than A020639(n)^2, where A020639(n) is the smallest prime dividing n, a(1) = 1.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	3
10	2
11	11
12	3
13	13
14	2
15	5
16	2
17	17
18	3
19	19
20	2
21	7
22	2
23	23
24	3
25	5
26	2
27	3
28	2
29	29
30	3
31	31
32	2
33	3
34	2
35	7
36	3
37	37
38	2
39	3
40	2
41	41
42	3
43	43
44	2
45	5
46	2
47	47
48	3
49	7
50	2
51	3
52	2
53	53
54	3
55	11
56	2
57	3
58	2
59	59
60	3
61	61
62	2
63	7
64	2
65	13
66	3
67	67
68	2
69	3
70	2
71	71
72	3
73	73
74	2
75	5
76	2
77	11
78	3
79	79
80	2
81	3
82	2
83	83
84	3
85	17
86	2
87	3
88	2
89	89
90	3
91	13
92	2
93	3
94	2
95	19
96	3
97	97
98	2
99	3
100	2
101	101
102	3
103	103
104	2
105	7
106	2
107	107
108	3
109	109

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	3
10	2
11	11
12	3
13	13
14	2
15	5
16	2
17	17
18	3
19	19
20	2
21	7
22	2
23	23
24	3
25	5
26	2
27	3
28	2
29	29
30	3
31	31
32	2
33	3
34	2
35	7
36	3
37	37
38	2
39	3
40	2
41	41
42	3
43	43
44	2
45	5
46	2
47	47
48	3
49	7
50	2
51	3
52	2
53	53
54	3
55	11
56	2
57	3
58	2
59	59
60	3
61	61
62	2
63	7
64	2
65	13
66	3
67	67
68	2
69	3
70	2
71	71
72	3
73	73
74	2
75	5
76	2
77	11
78	3
79	79
80	2
81	3
82	2
83	83
84	3
85	17
86	2
87	3
88	2
89	89
90	3
91	13
92	2
93	3
94	2
95	19
96	3
97	97
98	2
99	3
100	2
101	101
102	3
103	103
104	2
105	7
106	2
107	107
108	3
109	109

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	2
9	3
10	2
11	11
12	3
13	13
14	2
15	5
16	2
17	17
18	3
19	19
20	2
21	7
22	2
23	23
24	3
25	5
26	2
27	3
28	2
29	29
30	3
31	31
32	2
33	3
34	2
35	7
36	3
37	37
38	2
39	3
40	2
41	41
42	3
43	43
44	2
45	5
46	2
47	47
48	3
49	7
50	2
51	3
52	2
53	53
54	3
55	11
56	2
57	3
58	2
59	59
60	3
61	61
62	2
63	7
64	2
65	13
66	3
67	67
68	2
69	3
70	2
71	71
72	3
73	73
74	2
75	5
76	2
77	11
78	3
79	79
80	2
81	3
82	2
83	83
84	3
85	17
86	2
87	3
88	2
89	89
90	3
91	13
92	2
93	3
94	2
95	19
96	3
97	97
98	2
99	3
100	2
101	101
102	3
103	103
104	2
105	7
106	2
107	107
108	3
109	109