A307486 - cp's OEIS frontend

A307486 a(0) = 3; a(n) = smallest k > 1 such that 1 + a(0)a(1)...a(n-1)k is composite.

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

[3, 3, 3, 2, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2]

cp's OEIS Frontend

A307486 a(0) = 3; a(n) = smallest k > 1 such that 1 + a(0)a(1)...a(n-1)k is composite.

Table of values

List of values

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

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

cp's OEIS Frontend

A307486 a(0) = 3; a(n) = smallest k > 1 such that 1 + a(0)*a(1)*...*a(n-1)*k is composite.

Table of values

List of values

A307486 a(0) = 3; a(n) = smallest k > 1 such that 1 + a(0)a(1)...a(n-1)k is composite.

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