A379654 - cp's OEIS frontend

A379654 Least positive integer k <= n such that |tau(k)|*n + 1 is prime, or 0 if such k does not exist, where the tau function is given by A000594.

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

[1, 1, 2, 1, 5, 1, 5, 2, 3, 1, 4, 1, 2, 2, 11, 1, 2, 1, 2, 5, 13, 1, 4, 2, 2, 3, 5, 1, 3, 1, 5, 2, 3, 6, 3, 1, 21, 15, 2, 1, 3, 1, 2, 11, 5, 1, 2, 2, 6, 2, 3, 1, 4, 2, 2, 11, 7, 1, 3, 1, 3, 2, 3, 5, 3, 1, 2, 3, 2, 1, 4, 1, 2, 2, 2, 6, 10, 1, 15, 3, 4, 1, 2, 2, 5, 3, 2, 1, 2, 2, 6, 12, 4, 3, 2, 1, 7, 3, 2, 1]

cp's OEIS Frontend

A379654 Least positive integer k <= n such that |tau(k)|*n + 1 is prime, or 0 if such k does not exist, where the tau function is given by A000594.

Table of values

List of values

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

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

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