A223702 - cp's OEIS frontend

A223702 Irregular triangle of numbers k such that A002313(n), the n-th prime not congruent to 3 mod 4 is the largest prime factor of k^2 + 1.

n	a(n)
1	1
2	2
3	3
4	7
5	5
6	8
7	18
8	57
9	239
10	4
11	13
12	21
13	38
14	47
15	268
16	12
17	17
18	41
19	70
20	99
21	157
22	307
23	6
24	31
25	43
26	68
27	117
28	191
29	302
30	327
31	882
32	18543
33	9
34	32
35	73
36	132
37	278
38	378
39	829
40	993
41	2943
42	23
43	30
44	83
45	182
46	242
47	401
48	447
49	606
50	931
51	1143
52	1772
53	6118
54	34208
55	44179
56	85353
57	485298

[1, 2, 3, 7, 5, 8, 18, 57, 239, 4, 13, 21, 38, 47, 268, 12, 17, 41, 70, 99, 157, 307, 6, 31, 43, 68, 117, 191, 302, 327, 882, 18543, 9, 32, 73, 132, 278, 378, 829, 993, 2943, 23, 30, 83, 182, 242, 401, 447, 606, 931, 1143, 1772, 6118, 34208, 44179, 85353, 485298]

cp's OEIS Frontend

A223702 Irregular triangle of numbers k such that A002313(n), the n-th prime not congruent to 3 mod 4 is the largest prime factor of k^2 + 1.

Table of values

List of values