A263877 - cp's OEIS frontend

A263877 Numbers n such that n^2 + 1 has three distinct prime divisors less than n.

n	a(n)
1	21
2	43
3	57
4	72
5	99
6	111
7	117
8	119
9	128
10	132
11	142
12	172
13	174
14	185
15	192
16	193
17	200
18	211
19	212
20	216
21	251
22	268
23	294
24	305
25	322
26	336
27	338
28	342
29	351
30	360
31	378
32	394
33	408
34	418
35	431
36	443
37	448
38	450
39	460
40	485
41	498
42	509
43	515
44	524
45	552
46	560
47	562
48	568
49	580
50	601
51	606
52	612
53	616

[21, 43, 57, 72, 99, 111, 117, 119, 128, 132, 142, 172, 174, 185, 192, 193, 200, 211, 212, 216, 251, 268, 294, 305, 322, 336, 338, 342, 351, 360, 378, 394, 408, 418, 431, 443, 448, 450, 460, 485, 498, 509, 515, 524, 552, 560, 562, 568, 580, 601, 606, 612, 616]

cp's OEIS Frontend

A263877 Numbers n such that n^2 + 1 has three distinct prime divisors less than n.

Table of values

List of values

n	a(n)
1	21
2	43
3	57
4	72
5	99
6	111
7	117
8	119
9	128
10	132
11	142
12	172
13	174
14	185
15	192
16	193
17	200
18	211
19	212
20	216
21	251
22	268
23	294
24	305
25	322
26	336
27	338
28	342
29	351
30	360
31	378
32	394
33	408
34	418
35	431
36	443
37	448
38	450
39	460
40	485
41	498
42	509
43	515
44	524
45	552
46	560
47	562
48	568
49	580
50	601
51	606
52	612
53	616

n	a(n)
1	21
2	43
3	57
4	72
5	99
6	111
7	117
8	119
9	128
10	132
11	142
12	172
13	174
14	185
15	192
16	193
17	200
18	211
19	212
20	216
21	251
22	268
23	294
24	305
25	322
26	336
27	338
28	342
29	351
30	360
31	378
32	394
33	408
34	418
35	431
36	443
37	448
38	450
39	460
40	485
41	498
42	509
43	515
44	524
45	552
46	560
47	562
48	568
49	580
50	601
51	606
52	612
53	616

n	a(n)
1	21
2	43
3	57
4	72
5	99
6	111
7	117
8	119
9	128
10	132
11	142
12	172
13	174
14	185
15	192
16	193
17	200
18	211
19	212
20	216
21	251
22	268
23	294
24	305
25	322
26	336
27	338
28	342
29	351
30	360
31	378
32	394
33	408
34	418
35	431
36	443
37	448
38	450
39	460
40	485
41	498
42	509
43	515
44	524
45	552
46	560
47	562
48	568
49	580
50	601
51	606
52	612
53	616