A173561 - cp's OEIS frontend

A173561 Numbers k such that gpf(k^2+1)/k sets a new record of low value, where gpf(k) is the greatest prime dividing k (A006530).

n	a(n)
1	1
2	3
3	7
4	38
5	47
6	57
7	157
8	239
9	829
10	882
11	993
12	1772
13	2673
14	2917
15	2943
16	4747
17	4952
18	5257
19	6118
20	9466
21	12943
22	17557
23	18543
24	34208
25	44179
26	72662
27	85353
28	114669
29	219602
30	260359
31	320078
32	330182
33	478707
34	485298
35	1083493
36	1143007
37	1477034
38	1528649
39	1615463
40	1635786
41	1984933

[1, 3, 7, 38, 47, 57, 157, 239, 829, 882, 993, 1772, 2673, 2917, 2943, 4747, 4952, 5257, 6118, 9466, 12943, 17557, 18543, 34208, 44179, 72662, 85353, 114669, 219602, 260359, 320078, 330182, 478707, 485298, 1083493, 1143007, 1477034, 1528649, 1615463, 1635786, 1984933]

cp's OEIS Frontend

A173561 Numbers k such that gpf(k^2+1)/k sets a new record of low value, where gpf(k) is the greatest prime dividing k (A006530).

Table of values

List of values