A380979 - cp's OEIS frontend

A380979 Composites that cause a witness to be added to a set of Fermat witnesses: a(n) is the smallest composite number that is not guaranteed composite using Fermat's Little Theorem by the witness A380978(i) for any i < n.

n	a(n)
1	4
2	341
3	1105
4	1729
5	29341
6	75361
7	162401
8	252601
9	294409
10	334153
11	399001
12	1152271
13	1615681
14	2508013
15	3581761
16	3828001
17	6189121
18	6733693
19	10024561
20	10267951
21	14469841
22	17098369
23	17236801
24	19384289
25	23382529
26	29111881
27	34657141
28	53711113
29	64377991
30	79411201
31	79624621

[4, 341, 1105, 1729, 29341, 75361, 162401, 252601, 294409, 334153, 399001, 1152271, 1615681, 2508013, 3581761, 3828001, 6189121, 6733693, 10024561, 10267951, 14469841, 17098369, 17236801, 19384289, 23382529, 29111881, 34657141, 53711113, 64377991, 79411201, 79624621]

cp's OEIS Frontend

A380979 Composites that cause a witness to be added to a set of Fermat witnesses: a(n) is the smallest composite number that is not guaranteed composite using Fermat's Little Theorem by the witness A380978(i) for any i < n.

Table of values

List of values