A223701 - cp's OEIS frontend

A223701 Irregular triangle of numbers k such that prime(n) is the largest prime factor of k^2 - 1.

n	a(n)
1	3
2	2
3	5
4	7
5	17
6	4
7	9
8	11
9	19
10	26
11	31
12	49
13	161
14	6
15	8
16	13
17	15
18	29
19	41
20	55
21	71
22	97
23	99
24	127
25	244
26	251
27	449
28	4801
29	8749
30	10
31	21
32	23
33	34
34	43
35	65
36	76
37	89
38	109
39	111
40	197
41	199
42	241
43	351
44	485
45	769
46	881
47	1079
48	6049
49	19601
50	12
51	14
52	25
53	27
54	51
55	53
56	64
57	79
58	129
59	131
60	155

[3, 2, 5, 7, 17, 4, 9, 11, 19, 26, 31, 49, 161, 6, 8, 13, 15, 29, 41, 55, 71, 97, 99, 127, 244, 251, 449, 4801, 8749, 10, 21, 23, 34, 43, 65, 76, 89, 109, 111, 197, 199, 241, 351, 485, 769, 881, 1079, 6049, 19601, 12, 14, 25, 27, 51, 53, 64, 79, 129, 131, 155]

cp's OEIS Frontend

A223701 Irregular triangle of numbers k such that prime(n) is the largest prime factor of k^2 - 1.

Table of values

List of values