A120621 - cp's OEIS frontend

A120621 Least positive k such that !n + k is prime, where !n is left factorial.

n	a(n)
0	2
1	1
2	1
3	1
4	1
5	3
6	3
7	3
8	9
9	3
10	7
11	9
12	7
13	13
14	49
15	27
16	9
17	37
18	19
19	33
20	7
21	93
22	103
23	9
24	73
25	27
26	13
27	27
28	165
29	49
30	39
31	93
32	97
33	27
34	37
35	39
36	135
37	7
38	193
39	249
40	39
41	103
42	13
43	33
44	213
45	129
46	33
47	13
48	39
49	115
50	187
51	19
52	7
53	387
54	19
55	489
56	303
57	63
58	33
59	235
60	297
61	495
62	657
63	465
64	235
65	193
66	369
67	129

[2, 1, 1, 1, 1, 3, 3, 3, 9, 3, 7, 9, 7, 13, 49, 27, 9, 37, 19, 33, 7, 93, 103, 9, 73, 27, 13, 27, 165, 49, 39, 93, 97, 27, 37, 39, 135, 7, 193, 249, 39, 103, 13, 33, 213, 129, 33, 13, 39, 115, 187, 19, 7, 387, 19, 489, 303, 63, 33, 235, 297, 495, 657, 465, 235, 193, 369, 129]

cp's OEIS Frontend

A120621 Least positive k such that !n + k is prime, where !n is left factorial.

Table of values

List of values

n	a(n)
0	2
1	1
2	1
3	1
4	1
5	3
6	3
7	3
8	9
9	3
10	7
11	9
12	7
13	13
14	49
15	27
16	9
17	37
18	19
19	33
20	7
21	93
22	103
23	9
24	73
25	27
26	13
27	27
28	165
29	49
30	39
31	93
32	97
33	27
34	37
35	39
36	135
37	7
38	193
39	249
40	39
41	103
42	13
43	33
44	213
45	129
46	33
47	13
48	39
49	115
50	187
51	19
52	7
53	387
54	19
55	489
56	303
57	63
58	33
59	235
60	297
61	495
62	657
63	465
64	235
65	193
66	369
67	129

n	a(n)
0	2
1	1
2	1
3	1
4	1
5	3
6	3
7	3
8	9
9	3
10	7
11	9
12	7
13	13
14	49
15	27
16	9
17	37
18	19
19	33
20	7
21	93
22	103
23	9
24	73
25	27
26	13
27	27
28	165
29	49
30	39
31	93
32	97
33	27
34	37
35	39
36	135
37	7
38	193
39	249
40	39
41	103
42	13
43	33
44	213
45	129
46	33
47	13
48	39
49	115
50	187
51	19
52	7
53	387
54	19
55	489
56	303
57	63
58	33
59	235
60	297
61	495
62	657
63	465
64	235
65	193
66	369
67	129

n	a(n)
0	2
1	1
2	1
3	1
4	1
5	3
6	3
7	3
8	9
9	3
10	7
11	9
12	7
13	13
14	49
15	27
16	9
17	37
18	19
19	33
20	7
21	93
22	103
23	9
24	73
25	27
26	13
27	27
28	165
29	49
30	39
31	93
32	97
33	27
34	37
35	39
36	135
37	7
38	193
39	249
40	39
41	103
42	13
43	33
44	213
45	129
46	33
47	13
48	39
49	115
50	187
51	19
52	7
53	387
54	19
55	489
56	303
57	63
58	33
59	235
60	297
61	495
62	657
63	465
64	235
65	193
66	369
67	129