A245478 - cp's OEIS frontend

A245478 Numbers k such that the k-th cyclotomic polynomial has a root mod 5.

n	a(n)
1	1
2	2
3	4
4	5
5	10
6	20
7	25
8	50
9	100
10	125
11	250
12	500
13	625
14	1250
15	2500
16	3125
17	6250
18	12500
19	15625
20	31250
21	62500
22	78125
23	156250
24	312500
25	390625
26	781250
27	1562500
28	1953125
29	3906250
30	7812500
31	9765625
32	19531250
33	39062500
34	48828125
35	97656250
36	195312500
37	244140625
38	488281250

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 625, 1250, 2500, 3125, 6250, 12500, 15625, 31250, 62500, 78125, 156250, 312500, 390625, 781250, 1562500, 1953125, 3906250, 7812500, 9765625, 19531250, 39062500, 48828125, 97656250, 195312500, 244140625, 488281250]

cp's OEIS Frontend

A245478 Numbers k such that the k-th cyclotomic polynomial has a root mod 5.

Table of values

List of values