A256011 - cp's OEIS frontend

A256011 Integers n with the property that the largest prime factor of n^2 + 1 is less than n.

n	a(n)
1	7
2	18
3	21
4	38
5	41
6	43
7	47
8	57
9	68
10	70
11	72
12	73
13	83
14	99
15	111
16	117
17	119
18	123
19	128
20	132
21	133
22	142
23	157
24	172
25	173
26	174
27	182
28	185
29	191
30	192
31	193
32	200
33	211
34	212
35	216
36	233
37	237
38	239
39	242
40	251
41	253
42	255
43	265
44	268
45	273
46	278
47	293
48	294
49	302
50	305
51	307
52	313
53	319
54	322
55	327

[7, 18, 21, 38, 41, 43, 47, 57, 68, 70, 72, 73, 83, 99, 111, 117, 119, 123, 128, 132, 133, 142, 157, 172, 173, 174, 182, 185, 191, 192, 193, 200, 211, 212, 216, 233, 237, 239, 242, 251, 253, 255, 265, 268, 273, 278, 293, 294, 302, 305, 307, 313, 319, 322, 327]

cp's OEIS Frontend

A256011 Integers n with the property that the largest prime factor of n^2 + 1 is less than n.

Table of values

List of values

n	a(n)
1	7
2	18
3	21
4	38
5	41
6	43
7	47
8	57
9	68
10	70
11	72
12	73
13	83
14	99
15	111
16	117
17	119
18	123
19	128
20	132
21	133
22	142
23	157
24	172
25	173
26	174
27	182
28	185
29	191
30	192
31	193
32	200
33	211
34	212
35	216
36	233
37	237
38	239
39	242
40	251
41	253
42	255
43	265
44	268
45	273
46	278
47	293
48	294
49	302
50	305
51	307
52	313
53	319
54	322
55	327

n	a(n)
1	7
2	18
3	21
4	38
5	41
6	43
7	47
8	57
9	68
10	70
11	72
12	73
13	83
14	99
15	111
16	117
17	119
18	123
19	128
20	132
21	133
22	142
23	157
24	172
25	173
26	174
27	182
28	185
29	191
30	192
31	193
32	200
33	211
34	212
35	216
36	233
37	237
38	239
39	242
40	251
41	253
42	255
43	265
44	268
45	273
46	278
47	293
48	294
49	302
50	305
51	307
52	313
53	319
54	322
55	327

n	a(n)
1	7
2	18
3	21
4	38
5	41
6	43
7	47
8	57
9	68
10	70
11	72
12	73
13	83
14	99
15	111
16	117
17	119
18	123
19	128
20	132
21	133
22	142
23	157
24	172
25	173
26	174
27	182
28	185
29	191
30	192
31	193
32	200
33	211
34	212
35	216
36	233
37	237
38	239
39	242
40	251
41	253
42	255
43	265
44	268
45	273
46	278
47	293
48	294
49	302
50	305
51	307
52	313
53	319
54	322
55	327