A302040 - cp's OEIS frontend

A302040 Numbers k such that A078898(k) is a power of 2; an analog for A000961 based on factorization-kind of process involving the sieve of Eratosthenes (A083221).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	29
18	31
19	32
20	37
21	41
22	43
23	45
24	47
25	49
26	53
27	55
28	59
29	61
30	64
31	67
32	71
33	73
34	79
35	83
36	89
37	91
38	93
39	97
40	101
41	103
42	107
43	109
44	113
45	115
46	121
47	127
48	128
49	131
50	137
51	139
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	187
62	189
63	191
64	193
65	197
66	199
67	203
68	211
69	223
70	227
71	229
72	233
73	235
74	239
75	241
76	247
77	251
78	256
79	257

[1, 2, 3, 4, 5, 7, 8, 9, 11, 13, 16, 17, 19, 21, 23, 25, 29, 31, 32, 37, 41, 43, 45, 47, 49, 53, 55, 59, 61, 64, 67, 71, 73, 79, 83, 89, 91, 93, 97, 101, 103, 107, 109, 113, 115, 121, 127, 128, 131, 137, 139, 149, 151, 157, 163, 167, 169, 173, 179, 181, 187, 189, 191, 193, 197, 199, 203, 211, 223, 227, 229, 233, 235, 239, 241, 247, 251, 256, 257]

cp's OEIS Frontend

A302040 Numbers k such that A078898(k) is a power of 2; an analog for A000961 based on factorization-kind of process involving the sieve of Eratosthenes (A083221).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	29
18	31
19	32
20	37
21	41
22	43
23	45
24	47
25	49
26	53
27	55
28	59
29	61
30	64
31	67
32	71
33	73
34	79
35	83
36	89
37	91
38	93
39	97
40	101
41	103
42	107
43	109
44	113
45	115
46	121
47	127
48	128
49	131
50	137
51	139
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	187
62	189
63	191
64	193
65	197
66	199
67	203
68	211
69	223
70	227
71	229
72	233
73	235
74	239
75	241
76	247
77	251
78	256
79	257

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	29
18	31
19	32
20	37
21	41
22	43
23	45
24	47
25	49
26	53
27	55
28	59
29	61
30	64
31	67
32	71
33	73
34	79
35	83
36	89
37	91
38	93
39	97
40	101
41	103
42	107
43	109
44	113
45	115
46	121
47	127
48	128
49	131
50	137
51	139
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	187
62	189
63	191
64	193
65	197
66	199
67	203
68	211
69	223
70	227
71	229
72	233
73	235
74	239
75	241
76	247
77	251
78	256
79	257

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	11
10	13
11	16
12	17
13	19
14	21
15	23
16	25
17	29
18	31
19	32
20	37
21	41
22	43
23	45
24	47
25	49
26	53
27	55
28	59
29	61
30	64
31	67
32	71
33	73
34	79
35	83
36	89
37	91
38	93
39	97
40	101
41	103
42	107
43	109
44	113
45	115
46	121
47	127
48	128
49	131
50	137
51	139
52	149
53	151
54	157
55	163
56	167
57	169
58	173
59	179
60	181
61	187
62	189
63	191
64	193
65	197
66	199
67	203
68	211
69	223
70	227
71	229
72	233
73	235
74	239
75	241
76	247
77	251
78	256
79	257