A245696 - cp's OEIS frontend

A245696 Least number k >= 0 such that (n!-k)/n is prime.

n	a(n)
3	0
4	4
5	5
6	42
7	7
8	8
9	279
10	130
11	121
12	156
13	13
14	322
15	15
16	752
17	901
18	1062
19	779
20	2020
21	651
22	682
23	1679
24	2136
25	1825
26	3874
27	999
28	1204
29	2929
30	930
31	31
32	1952
33	33
34	34
35	6755
36	4068
37	4699
38	3686
39	39
40	2920
41	3403
42	5502
43	3397
44	4796
45	4905
46	2438
47	4183
48	3792
49	5047
50	2950
51	4947
52	9308
53	3551
54	3186
55	6985
56	3416
57	26277
58	16066
59	6431
60	8220
61	8479
62	4402
63	4473
64	6464
65	23335
66	8382
67	21239
68	12988
69	17319
70	7210
71	6887
72	54072
73	11899
74	27602

[0, 4, 5, 42, 7, 8, 279, 130, 121, 156, 13, 322, 15, 752, 901, 1062, 779, 2020, 651, 682, 1679, 2136, 1825, 3874, 999, 1204, 2929, 930, 31, 1952, 33, 34, 6755, 4068, 4699, 3686, 39, 2920, 3403, 5502, 3397, 4796, 4905, 2438, 4183, 3792, 5047, 2950, 4947, 9308, 3551, 3186, 6985, 3416, 26277, 16066, 6431, 8220, 8479, 4402, 4473, 6464, 23335, 8382, 21239, 12988, 17319, 7210, 6887, 54072, 11899, 27602]

cp's OEIS Frontend

A245696 Least number k >= 0 such that (n!-k)/n is prime.

Table of values

List of values