A204846 - cp's OEIS frontend

A204846 Irregular triangle read by rows in which row n lists algebraic prime factors of the repunit (10^n - 1)/9 (A002275(n)).

n	a(n)
1	1
2	1
3	1
4	11
5	1
6	3
7	11
8	37
9	1
10	11
11	101
12	3
13	37
14	11
15	41
16	271
17	1
18	3
19	7
20	11
21	13
22	37
23	101
24	1
25	11
26	239
27	4649
28	3
29	37
30	41
31	271
32	11
33	73
34	101
35	137
36	1
37	3
38	7
39	11
40	13
41	37
42	333667
43	1
44	11
45	41
46	101
47	271
48	9091
49	3
50	37
51	239
52	4649
53	11
54	21649
55	513239
56	1
57	3
58	7
59	11
60	13
61	37
62	73
63	101
64	137
65	9901
66	41
67	271

[1, 1, 1, 11, 1, 3, 11, 37, 1, 11, 101, 3, 37, 11, 41, 271, 1, 3, 7, 11, 13, 37, 101, 1, 11, 239, 4649, 3, 37, 41, 271, 11, 73, 101, 137, 1, 3, 7, 11, 13, 37, 333667, 1, 11, 41, 101, 271, 9091, 3, 37, 239, 4649, 11, 21649, 513239, 1, 3, 7, 11, 13, 37, 73, 101, 137, 9901, 41, 271]

cp's OEIS Frontend

A204846 Irregular triangle read by rows in which row n lists algebraic prime factors of the repunit (10^n - 1)/9 (A002275(n)).

Table of values

List of values