A237579 - cp's OEIS frontend

A237579 Least prime factor of (2n)! - n! + 1 (= A237580(n)).

n	a(n)
1	2
2	23
3	5
4	59
5	7
6	59
7	87178286161
8	29
9	11
10	443
11	13
12	587
13	403291461126605629356979201
14	3307
15	17
16	43
17	19
18	131
19	83
20	2791
21	23
22	113
23	5502622159812088949850305428800254867109635014075023360001
24	659
25	761
26	6108689
27	29
28	233
29	31
30	67
31	181
32	25649409970727
33	1561016461
34	151
35	37
36	223
37	53
38	139
39	41
40	29209
41	43
42	61

[2, 23, 5, 59, 7, 59, 87178286161, 29, 11, 443, 13, 587, 403291461126605629356979201, 3307, 17, 43, 19, 131, 83, 2791, 23, 113, 5502622159812088949850305428800254867109635014075023360001, 659, 761, 6108689, 29, 233, 31, 67, 181, 25649409970727, 1561016461, 151, 37, 223, 53, 139, 41, 29209, 43, 61]

cp's OEIS Frontend

A237579 Least prime factor of (2n)! - n! + 1 (= A237580(n)).

Table of values

List of values