A109287 - cp's OEIS frontend

A109287 4-almost primes equal to p*q + 1, where p and q are (not necessarily distinct) primes.

n	a(n)
1	16
2	36
3	40
4	56
5	88
6	135
7	156
8	184
9	204
10	210
11	220
12	248
13	250
14	260
15	296
16	306
17	315
18	328
19	330
20	340
21	342
22	372
23	414
24	459
25	472
26	490
27	516
28	536
29	546
30	580
31	584
32	636
33	650
34	686
35	690
36	708
37	714
38	732
39	735
40	738
41	804
42	808
43	819
44	836
45	850
46	852
47	870
48	872
49	940
50	950
51	966
52	975
53	996

[16, 36, 40, 56, 88, 135, 156, 184, 204, 210, 220, 248, 250, 260, 296, 306, 315, 328, 330, 340, 342, 372, 414, 459, 472, 490, 516, 536, 546, 580, 584, 636, 650, 686, 690, 708, 714, 732, 735, 738, 804, 808, 819, 836, 850, 852, 870, 872, 940, 950, 966, 975, 996]

cp's OEIS Frontend

A109287 4-almost primes equal to p*q + 1, where p and q are (not necessarily distinct) primes.

Table of values

List of values

n	a(n)
1	16
2	36
3	40
4	56
5	88
6	135
7	156
8	184
9	204
10	210
11	220
12	248
13	250
14	260
15	296
16	306
17	315
18	328
19	330
20	340
21	342
22	372
23	414
24	459
25	472
26	490
27	516
28	536
29	546
30	580
31	584
32	636
33	650
34	686
35	690
36	708
37	714
38	732
39	735
40	738
41	804
42	808
43	819
44	836
45	850
46	852
47	870
48	872
49	940
50	950
51	966
52	975
53	996

n	a(n)
1	16
2	36
3	40
4	56
5	88
6	135
7	156
8	184
9	204
10	210
11	220
12	248
13	250
14	260
15	296
16	306
17	315
18	328
19	330
20	340
21	342
22	372
23	414
24	459
25	472
26	490
27	516
28	536
29	546
30	580
31	584
32	636
33	650
34	686
35	690
36	708
37	714
38	732
39	735
40	738
41	804
42	808
43	819
44	836
45	850
46	852
47	870
48	872
49	940
50	950
51	966
52	975
53	996

n	a(n)
1	16
2	36
3	40
4	56
5	88
6	135
7	156
8	184
9	204
10	210
11	220
12	248
13	250
14	260
15	296
16	306
17	315
18	328
19	330
20	340
21	342
22	372
23	414
24	459
25	472
26	490
27	516
28	536
29	546
30	580
31	584
32	636
33	650
34	686
35	690
36	708
37	714
38	732
39	735
40	738
41	804
42	808
43	819
44	836
45	850
46	852
47	870
48	872
49	940
50	950
51	966
52	975
53	996