A378111 - cp's OEIS frontend

A378111 a(n) is the least prime p such that there are exactly n squarefree numbers strictly between p and the next prime, or -1 if there is no such p.

n	a(n)
0	2
1	5
2	13
3	31
4	89
5	139
6	113
7	199
8	211
9	317
10	1759
11	1381
12	1951
13	887
14	4523
15	2179
16	2477
17	4831
18	5351
19	4297
20	1327
21	9973
22	14107
23	19333
24	16141
25	20809
26	15683
27	37907
28	28229
29	58831
30	31907
31	19609
32	25471
33	40289
34	114493
35	43331
36	44293
37	34061
38	191353
39	31397
40	107377
41	134513
42	186481
43	448451
44	175141
45	332317
46	188029

[2, 5, 13, 31, 89, 139, 113, 199, 211, 317, 1759, 1381, 1951, 887, 4523, 2179, 2477, 4831, 5351, 4297, 1327, 9973, 14107, 19333, 16141, 20809, 15683, 37907, 28229, 58831, 31907, 19609, 25471, 40289, 114493, 43331, 44293, 34061, 191353, 31397, 107377, 134513, 186481, 448451, 175141, 332317, 188029]

cp's OEIS Frontend

A378111 a(n) is the least prime p such that there are exactly n squarefree numbers strictly between p and the next prime, or -1 if there is no such p.

Table of values

List of values