A245715 - cp's OEIS frontend

A245715 Least number k > 0 such that n - k! is prime, or 0 if no such k exists.

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	0
11	3
12	1
13	2
14	1
15	2
16	0
17	3
18	1
19	2
20	1
21	2
22	0
23	3
24	1
25	2
26	4
27	4
28	0
29	3
30	1
31	2
32	1
33	2
34	0
35	3
36	0
37	3
38	1
39	2
40	0
41	4
42	1
43	2
44	1
45	2
46	0
47	3
48	1
49	2
50	0
51	0
52	0
53	3
54	1
55	2
56	0
57	0
58	0
59	3
60	1
61	2
62	1
63	2
64	0
65	3
66	0
67	3
68	1
69	2
70	0
71	4
72	1
73	2
74	1
75	2
76	0
77	3
78	0
79	3
80	1
81	2
82	0
83	4
84	1
85	2
86	0
87	0
88	0
89	3
90	1
91	2
92	0
93	0
94	0
95	3
96	0
97	4
98	1
99	2
100	0
101	0
102	1
103	2
104	1
105	2
106	0
107	3
108	1
109	2
110	1
111	2
112	0
113	3
114	1
115	2
116	0
117	0
118	0
119	3

[0, 0, 1, 1, 2, 1, 2, 1, 2, 0, 3, 1, 2, 1, 2, 0, 3, 1, 2, 1, 2, 0, 3, 1, 2, 4, 4, 0, 3, 1, 2, 1, 2, 0, 3, 0, 3, 1, 2, 0, 4, 1, 2, 1, 2, 0, 3, 1, 2, 0, 0, 0, 3, 1, 2, 0, 0, 0, 3, 1, 2, 1, 2, 0, 3, 0, 3, 1, 2, 0, 4, 1, 2, 1, 2, 0, 3, 0, 3, 1, 2, 0, 4, 1, 2, 0, 0, 0, 3, 1, 2, 0, 0, 0, 3, 0, 4, 1, 2, 0, 0, 1, 2, 1, 2, 0, 3, 1, 2, 1, 2, 0, 3, 1, 2, 0, 0, 0, 3]

cp's OEIS Frontend

A245715 Least number k > 0 such that n - k! is prime, or 0 if no such k exists.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	0
11	3
12	1
13	2
14	1
15	2
16	0
17	3
18	1
19	2
20	1
21	2
22	0
23	3
24	1
25	2
26	4
27	4
28	0
29	3
30	1
31	2
32	1
33	2
34	0
35	3
36	0
37	3
38	1
39	2
40	0
41	4
42	1
43	2
44	1
45	2
46	0
47	3
48	1
49	2
50	0
51	0
52	0
53	3
54	1
55	2
56	0
57	0
58	0
59	3
60	1
61	2
62	1
63	2
64	0
65	3
66	0
67	3
68	1
69	2
70	0
71	4
72	1
73	2
74	1
75	2
76	0
77	3
78	0
79	3
80	1
81	2
82	0
83	4
84	1
85	2
86	0
87	0
88	0
89	3
90	1
91	2
92	0
93	0
94	0
95	3
96	0
97	4
98	1
99	2
100	0
101	0
102	1
103	2
104	1
105	2
106	0
107	3
108	1
109	2
110	1
111	2
112	0
113	3
114	1
115	2
116	0
117	0
118	0
119	3

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	0
11	3
12	1
13	2
14	1
15	2
16	0
17	3
18	1
19	2
20	1
21	2
22	0
23	3
24	1
25	2
26	4
27	4
28	0
29	3
30	1
31	2
32	1
33	2
34	0
35	3
36	0
37	3
38	1
39	2
40	0
41	4
42	1
43	2
44	1
45	2
46	0
47	3
48	1
49	2
50	0
51	0
52	0
53	3
54	1
55	2
56	0
57	0
58	0
59	3
60	1
61	2
62	1
63	2
64	0
65	3
66	0
67	3
68	1
69	2
70	0
71	4
72	1
73	2
74	1
75	2
76	0
77	3
78	0
79	3
80	1
81	2
82	0
83	4
84	1
85	2
86	0
87	0
88	0
89	3
90	1
91	2
92	0
93	0
94	0
95	3
96	0
97	4
98	1
99	2
100	0
101	0
102	1
103	2
104	1
105	2
106	0
107	3
108	1
109	2
110	1
111	2
112	0
113	3
114	1
115	2
116	0
117	0
118	0
119	3

n	a(n)
1	0
2	0
3	1
4	1
5	2
6	1
7	2
8	1
9	2
10	0
11	3
12	1
13	2
14	1
15	2
16	0
17	3
18	1
19	2
20	1
21	2
22	0
23	3
24	1
25	2
26	4
27	4
28	0
29	3
30	1
31	2
32	1
33	2
34	0
35	3
36	0
37	3
38	1
39	2
40	0
41	4
42	1
43	2
44	1
45	2
46	0
47	3
48	1
49	2
50	0
51	0
52	0
53	3
54	1
55	2
56	0
57	0
58	0
59	3
60	1
61	2
62	1
63	2
64	0
65	3
66	0
67	3
68	1
69	2
70	0
71	4
72	1
73	2
74	1
75	2
76	0
77	3
78	0
79	3
80	1
81	2
82	0
83	4
84	1
85	2
86	0
87	0
88	0
89	3
90	1
91	2
92	0
93	0
94	0
95	3
96	0
97	4
98	1
99	2
100	0
101	0
102	1
103	2
104	1
105	2
106	0
107	3
108	1
109	2
110	1
111	2
112	0
113	3
114	1
115	2
116	0
117	0
118	0
119	3