A329229 - cp's OEIS frontend

A329229 Numbers that are the product of two odd prime powers with Euler phi-functions having solely a single 2 as a common prime factor.

n	a(n)
1	15
2	21
3	33
4	35
5	39
6	45
7	51
8	55
9	57
10	69
11	75
12	77
13	87
14	93
15	95
16	99
17	111
18	115
19	119
20	123
21	129
22	135
23	141
24	143
25	147
26	153
27	155
28	159
29	161
30	175
31	177
32	183
33	187
34	201
35	203
36	207
37	209
38	213
39	215
40	219
41	225
42	235
43	237
44	245
45	249
46	253
47	261
48	267
49	287
50	291
51	295
52	297
53	299
54	303
55	309
56	319

[15, 21, 33, 35, 39, 45, 51, 55, 57, 69, 75, 77, 87, 93, 95, 99, 111, 115, 119, 123, 129, 135, 141, 143, 147, 153, 155, 159, 161, 175, 177, 183, 187, 201, 203, 207, 209, 213, 215, 219, 225, 235, 237, 245, 249, 253, 261, 267, 287, 291, 295, 297, 299, 303, 309, 319]

cp's OEIS Frontend

A329229 Numbers that are the product of two odd prime powers with Euler phi-functions having solely a single 2 as a common prime factor.

Table of values

List of values

n	a(n)
1	15
2	21
3	33
4	35
5	39
6	45
7	51
8	55
9	57
10	69
11	75
12	77
13	87
14	93
15	95
16	99
17	111
18	115
19	119
20	123
21	129
22	135
23	141
24	143
25	147
26	153
27	155
28	159
29	161
30	175
31	177
32	183
33	187
34	201
35	203
36	207
37	209
38	213
39	215
40	219
41	225
42	235
43	237
44	245
45	249
46	253
47	261
48	267
49	287
50	291
51	295
52	297
53	299
54	303
55	309
56	319

n	a(n)
1	15
2	21
3	33
4	35
5	39
6	45
7	51
8	55
9	57
10	69
11	75
12	77
13	87
14	93
15	95
16	99
17	111
18	115
19	119
20	123
21	129
22	135
23	141
24	143
25	147
26	153
27	155
28	159
29	161
30	175
31	177
32	183
33	187
34	201
35	203
36	207
37	209
38	213
39	215
40	219
41	225
42	235
43	237
44	245
45	249
46	253
47	261
48	267
49	287
50	291
51	295
52	297
53	299
54	303
55	309
56	319

n	a(n)
1	15
2	21
3	33
4	35
5	39
6	45
7	51
8	55
9	57
10	69
11	75
12	77
13	87
14	93
15	95
16	99
17	111
18	115
19	119
20	123
21	129
22	135
23	141
24	143
25	147
26	153
27	155
28	159
29	161
30	175
31	177
32	183
33	187
34	201
35	203
36	207
37	209
38	213
39	215
40	219
41	225
42	235
43	237
44	245
45	249
46	253
47	261
48	267
49	287
50	291
51	295
52	297
53	299
54	303
55	309
56	319