A308482 - cp's OEIS frontend

A308482 Composites c such that T_{c-1} == (c/3)*3^(c-1) (mod c), where T_i denotes the i-th central trinomial coefficient (A002426) and (/) denotes the Kronecker symbol.

n	a(n)
1	4
2	9
3	20
4	25
5	27
6	40
7	49
8	80
9	81
10	121
11	169
12	189
13	243
14	272
15	289
16	361
17	369
18	400
19	416
20	470
21	529
22	544
23	567
24	729
25	841
26	961
27	1071
28	1323
29	1369
30	1539
31	1681
32	1849
33	2000
34	2187
35	2209
36	2809
37	2889
38	3213
39	3481
40	3721
41	4489
42	4617
43	5041
44	5329
45	6241
46	6561
47	6889
48	7749
49	7921
50	8667

[4, 9, 20, 25, 27, 40, 49, 80, 81, 121, 169, 189, 243, 272, 289, 361, 369, 400, 416, 470, 529, 544, 567, 729, 841, 961, 1071, 1323, 1369, 1539, 1681, 1849, 2000, 2187, 2209, 2809, 2889, 3213, 3481, 3721, 4489, 4617, 5041, 5329, 6241, 6561, 6889, 7749, 7921, 8667]

cp's OEIS Frontend

A308482 Composites c such that T_{c-1} == (c/3)*3^(c-1) (mod c), where T_i denotes the i-th central trinomial coefficient (A002426) and (/) denotes the Kronecker symbol.

Table of values

List of values