A075409 - cp's OEIS frontend

A075409 a(n) is the smallest m such that n!-m and n!+m are both primes.

n	a(n)
2	0
3	1
4	5
5	7
6	19
7	19
8	31
9	17
10	11
11	17
12	83
13	67
14	353
15	227
16	163
17	59
18	61
19	113
20	353
21	31
22	1447
23	571
24	389
25	191
26	337
27	883
28	101
29	1823
30	659
31	709
32	163
33	1361
34	439
35	307
36	1093
37	1733
38	2491
39	1063
40	1091
41	1999
42	1439
43	109
44	2753
45	607
46	2617
47	269
48	103
49	2663
50	337
51	14447
52	2221
53	5471
54	2887

[0, 1, 5, 7, 19, 19, 31, 17, 11, 17, 83, 67, 353, 227, 163, 59, 61, 113, 353, 31, 1447, 571, 389, 191, 337, 883, 101, 1823, 659, 709, 163, 1361, 439, 307, 1093, 1733, 2491, 1063, 1091, 1999, 1439, 109, 2753, 607, 2617, 269, 103, 2663, 337, 14447, 2221, 5471, 2887]

cp's OEIS Frontend

A075409 a(n) is the smallest m such that n!-m and n!+m are both primes.

Table of values

List of values