A280405 - cp's OEIS frontend

A280405 Odd semiprimes that cannot be represented as 2p+3q, where p and q are primes.

n	a(n)
1	9
2	33
3	51
4	69
5	87
6	111
7	123
8	141
9	159
10	177
11	201
12	213
13	237
14	249
15	267
16	291
17	303
18	321
19	339
20	381
21	393
22	411
23	447
24	471
25	489
26	501
27	519
28	537
29	573
30	591
31	633
32	669
33	681
34	699
35	717
36	753
37	771
38	789
39	807
40	831
41	843
42	879
43	921
44	933
45	951
46	993

[9, 33, 51, 69, 87, 111, 123, 141, 159, 177, 201, 213, 237, 249, 267, 291, 303, 321, 339, 381, 393, 411, 447, 471, 489, 501, 519, 537, 573, 591, 633, 669, 681, 699, 717, 753, 771, 789, 807, 831, 843, 879, 921, 933, 951, 993]

cp's OEIS Frontend

A280405 Odd semiprimes that cannot be represented as 2p+3q, where p and q are primes.

Table of values

List of values

n	a(n)
1	9
2	33
3	51
4	69
5	87
6	111
7	123
8	141
9	159
10	177
11	201
12	213
13	237
14	249
15	267
16	291
17	303
18	321
19	339
20	381
21	393
22	411
23	447
24	471
25	489
26	501
27	519
28	537
29	573
30	591
31	633
32	669
33	681
34	699
35	717
36	753
37	771
38	789
39	807
40	831
41	843
42	879
43	921
44	933
45	951
46	993

n	a(n)
1	9
2	33
3	51
4	69
5	87
6	111
7	123
8	141
9	159
10	177
11	201
12	213
13	237
14	249
15	267
16	291
17	303
18	321
19	339
20	381
21	393
22	411
23	447
24	471
25	489
26	501
27	519
28	537
29	573
30	591
31	633
32	669
33	681
34	699
35	717
36	753
37	771
38	789
39	807
40	831
41	843
42	879
43	921
44	933
45	951
46	993

n	a(n)
1	9
2	33
3	51
4	69
5	87
6	111
7	123
8	141
9	159
10	177
11	201
12	213
13	237
14	249
15	267
16	291
17	303
18	321
19	339
20	381
21	393
22	411
23	447
24	471
25	489
26	501
27	519
28	537
29	573
30	591
31	633
32	669
33	681
34	699
35	717
36	753
37	771
38	789
39	807
40	831
41	843
42	879
43	921
44	933
45	951
46	993