A330205 - cp's OEIS frontend

A330205 Composite numbers k such that P(k, 7) == 7 (mod k), where P(k, 7) = A084768(k) is the k-th Legendre polynomial evaluated at 7.

n	a(n)
1	6
2	15
3	21
4	22
5	105
6	119
7	231
8	426
9	483
10	1290
11	1939
12	4429
13	4450
14	4578
15	10609
16	12999
17	14118
18	16899
19	23262
20	26733
21	37401
22	39858
23	82194
24	108345
25	121335
26	127434
27	302253
28	380757
29	724647
30	836437
31	840147
32	1078270
33	1522677
34	2007411
35	15009050
36	28913991

[6, 15, 21, 22, 105, 119, 231, 426, 483, 1290, 1939, 4429, 4450, 4578, 10609, 12999, 14118, 16899, 23262, 26733, 37401, 39858, 82194, 108345, 121335, 127434, 302253, 380757, 724647, 836437, 840147, 1078270, 1522677, 2007411, 15009050, 28913991]

cp's OEIS Frontend

A330205 Composite numbers k such that P(k, 7) == 7 (mod k), where P(k, 7) = A084768(k) is the k-th Legendre polynomial evaluated at 7.

Table of values

List of values