A061414 - cp's OEIS frontend

A061414 Numbers k such that m*2^k - 1 is prime for exactly one coefficient m in the range 0 <= m <= k.

n	a(n)
1	8
2	9
3	19
4	23
5	25
6	26
7	34
8	39
9	58
10	64
11	66
12	68
13	82
14	83
15	84
16	86
17	108
18	109
19	117
20	118
21	128
22	129
23	130
24	134
25	136
26	150
27	151
28	175
29	176
30	178
31	179
32	194
33	197
34	227
35	231
36	234
37	240
38	241
39	248
40	258
41	259
42	275
43	276
44	278
45	281
46	309
47	315
48	316
49	317
50	330
51	331
52	332
53	336
54	337
55	339
56	340

[8, 9, 19, 23, 25, 26, 34, 39, 58, 64, 66, 68, 82, 83, 84, 86, 108, 109, 117, 118, 128, 129, 130, 134, 136, 150, 151, 175, 176, 178, 179, 194, 197, 227, 231, 234, 240, 241, 248, 258, 259, 275, 276, 278, 281, 309, 315, 316, 317, 330, 331, 332, 336, 337, 339, 340]

cp's OEIS Frontend

A061414 Numbers k such that m*2^k - 1 is prime for exactly one coefficient m in the range 0 <= m <= k.

Table of values

List of values

n	a(n)
1	8
2	9
3	19
4	23
5	25
6	26
7	34
8	39
9	58
10	64
11	66
12	68
13	82
14	83
15	84
16	86
17	108
18	109
19	117
20	118
21	128
22	129
23	130
24	134
25	136
26	150
27	151
28	175
29	176
30	178
31	179
32	194
33	197
34	227
35	231
36	234
37	240
38	241
39	248
40	258
41	259
42	275
43	276
44	278
45	281
46	309
47	315
48	316
49	317
50	330
51	331
52	332
53	336
54	337
55	339
56	340

n	a(n)
1	8
2	9
3	19
4	23
5	25
6	26
7	34
8	39
9	58
10	64
11	66
12	68
13	82
14	83
15	84
16	86
17	108
18	109
19	117
20	118
21	128
22	129
23	130
24	134
25	136
26	150
27	151
28	175
29	176
30	178
31	179
32	194
33	197
34	227
35	231
36	234
37	240
38	241
39	248
40	258
41	259
42	275
43	276
44	278
45	281
46	309
47	315
48	316
49	317
50	330
51	331
52	332
53	336
54	337
55	339
56	340

n	a(n)
1	8
2	9
3	19
4	23
5	25
6	26
7	34
8	39
9	58
10	64
11	66
12	68
13	82
14	83
15	84
16	86
17	108
18	109
19	117
20	118
21	128
22	129
23	130
24	134
25	136
26	150
27	151
28	175
29	176
30	178
31	179
32	194
33	197
34	227
35	231
36	234
37	240
38	241
39	248
40	258
41	259
42	275
43	276
44	278
45	281
46	309
47	315
48	316
49	317
50	330
51	331
52	332
53	336
54	337
55	339
56	340