A060687 - cp's OEIS frontend

A060687 Numbers k such that there exist exactly 2 Abelian groups of order k, i.e., A000688(k) = 2.

n	a(n)
1	4
2	9
3	12
4	18
5	20
6	25
7	28
8	44
9	45
10	49
11	50
12	52
13	60
14	63
15	68
16	75
17	76
18	84
19	90
20	92
21	98
22	99
23	116
24	117
25	121
26	124
27	126
28	132
29	140
30	147
31	148
32	150
33	153
34	156
35	164
36	169
37	171
38	172
39	175
40	188
41	198
42	204
43	207
44	212
45	220
46	228
47	234
48	236
49	242
50	244
51	245
52	260
53	261
54	268
55	275
56	276
57	279

[4, 9, 12, 18, 20, 25, 28, 44, 45, 49, 50, 52, 60, 63, 68, 75, 76, 84, 90, 92, 98, 99, 116, 117, 121, 124, 126, 132, 140, 147, 148, 150, 153, 156, 164, 169, 171, 172, 175, 188, 198, 204, 207, 212, 220, 228, 234, 236, 242, 244, 245, 260, 261, 268, 275, 276, 279]

cp's OEIS Frontend

A060687 Numbers k such that there exist exactly 2 Abelian groups of order k, i.e., A000688(k) = 2.

Table of values

List of values

n	a(n)
1	4
2	9
3	12
4	18
5	20
6	25
7	28
8	44
9	45
10	49
11	50
12	52
13	60
14	63
15	68
16	75
17	76
18	84
19	90
20	92
21	98
22	99
23	116
24	117
25	121
26	124
27	126
28	132
29	140
30	147
31	148
32	150
33	153
34	156
35	164
36	169
37	171
38	172
39	175
40	188
41	198
42	204
43	207
44	212
45	220
46	228
47	234
48	236
49	242
50	244
51	245
52	260
53	261
54	268
55	275
56	276
57	279

n	a(n)
1	4
2	9
3	12
4	18
5	20
6	25
7	28
8	44
9	45
10	49
11	50
12	52
13	60
14	63
15	68
16	75
17	76
18	84
19	90
20	92
21	98
22	99
23	116
24	117
25	121
26	124
27	126
28	132
29	140
30	147
31	148
32	150
33	153
34	156
35	164
36	169
37	171
38	172
39	175
40	188
41	198
42	204
43	207
44	212
45	220
46	228
47	234
48	236
49	242
50	244
51	245
52	260
53	261
54	268
55	275
56	276
57	279

n	a(n)
1	4
2	9
3	12
4	18
5	20
6	25
7	28
8	44
9	45
10	49
11	50
12	52
13	60
14	63
15	68
16	75
17	76
18	84
19	90
20	92
21	98
22	99
23	116
24	117
25	121
26	124
27	126
28	132
29	140
30	147
31	148
32	150
33	153
34	156
35	164
36	169
37	171
38	172
39	175
40	188
41	198
42	204
43	207
44	212
45	220
46	228
47	234
48	236
49	242
50	244
51	245
52	260
53	261
54	268
55	275
56	276
57	279