A080892 - cp's OEIS frontend

A080892 Numbers k such that 3^k-2 is a semiprime.

n	a(n)
1	3
2	8
3	10
4	12
5	13
6	15
7	16
8	19
9	20
10	21
11	25
12	28
13	39
14	42
15	44
16	48
17	55
18	57
19	60
20	66
21	67
22	76
23	78
24	85
25	118
26	130
27	156
28	162
29	193
30	212
31	214
32	217
33	218
34	228
35	244
36	312
37	330
38	352
39	357
40	376
41	386
42	388
43	412
44	442
45	449
46	464
47	480
48	525
49	545
50	552
51	630
52	644

[3, 8, 10, 12, 13, 15, 16, 19, 20, 21, 25, 28, 39, 42, 44, 48, 55, 57, 60, 66, 67, 76, 78, 85, 118, 130, 156, 162, 193, 212, 214, 217, 218, 228, 244, 312, 330, 352, 357, 376, 386, 388, 412, 442, 449, 464, 480, 525, 545, 552, 630, 644]

cp's OEIS Frontend

A080892 Numbers k such that 3^k-2 is a semiprime.

Table of values

List of values

n	a(n)
1	3
2	8
3	10
4	12
5	13
6	15
7	16
8	19
9	20
10	21
11	25
12	28
13	39
14	42
15	44
16	48
17	55
18	57
19	60
20	66
21	67
22	76
23	78
24	85
25	118
26	130
27	156
28	162
29	193
30	212
31	214
32	217
33	218
34	228
35	244
36	312
37	330
38	352
39	357
40	376
41	386
42	388
43	412
44	442
45	449
46	464
47	480
48	525
49	545
50	552
51	630
52	644

n	a(n)
1	3
2	8
3	10
4	12
5	13
6	15
7	16
8	19
9	20
10	21
11	25
12	28
13	39
14	42
15	44
16	48
17	55
18	57
19	60
20	66
21	67
22	76
23	78
24	85
25	118
26	130
27	156
28	162
29	193
30	212
31	214
32	217
33	218
34	228
35	244
36	312
37	330
38	352
39	357
40	376
41	386
42	388
43	412
44	442
45	449
46	464
47	480
48	525
49	545
50	552
51	630
52	644

n	a(n)
1	3
2	8
3	10
4	12
5	13
6	15
7	16
8	19
9	20
10	21
11	25
12	28
13	39
14	42
15	44
16	48
17	55
18	57
19	60
20	66
21	67
22	76
23	78
24	85
25	118
26	130
27	156
28	162
29	193
30	212
31	214
32	217
33	218
34	228
35	244
36	312
37	330
38	352
39	357
40	376
41	386
42	388
43	412
44	442
45	449
46	464
47	480
48	525
49	545
50	552
51	630
52	644