A197366 - cp's OEIS frontend

A197366 Number of Abelian groups of order 2n which are isomorphic with the group of units of the ring Z/kZ for some k.

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	0
8	3
9	1
10	2
11	1
12	2
13	0
14	1
15	1
16	4
17	0
18	3
19	0
20	3
21	1
22	1
23	1
24	3
25	0
26	1
27	1
28	1
29	1
30	2
31	0
32	5
33	1
34	0
35	1
36	5
37	0
38	0
39	1
40	3
41	1
42	1
43	0
44	3
45	0
46	1
47	0
48	5
49	0
50	1
51	1
52	1
53	1
54	3
55	1
56	3
57	0
58	1
59	0
60	2
61	0
62	0
63	1
64	5
65	1
66	1
67	0
68	1
69	1
70	1
71	0
72	6
73	0
74	1
75	1
76	0
77	0
78	2
79	0
80	5
81	1
82	1
83	1
84	2
85	0
86	1

[1, 2, 1, 2, 1, 2, 0, 3, 1, 2, 1, 2, 0, 1, 1, 4, 0, 3, 0, 3, 1, 1, 1, 3, 0, 1, 1, 1, 1, 2, 0, 5, 1, 0, 1, 5, 0, 0, 1, 3, 1, 1, 0, 3, 0, 1, 0, 5, 0, 1, 1, 1, 1, 3, 1, 3, 0, 1, 0, 2, 0, 0, 1, 5, 1, 1, 0, 1, 1, 1, 0, 6, 0, 1, 1, 0, 0, 2, 0, 5, 1, 1, 1, 2, 0, 1]

cp's OEIS Frontend

A197366 Number of Abelian groups of order 2n which are isomorphic with the group of units of the ring Z/kZ for some k.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	0
8	3
9	1
10	2
11	1
12	2
13	0
14	1
15	1
16	4
17	0
18	3
19	0
20	3
21	1
22	1
23	1
24	3
25	0
26	1
27	1
28	1
29	1
30	2
31	0
32	5
33	1
34	0
35	1
36	5
37	0
38	0
39	1
40	3
41	1
42	1
43	0
44	3
45	0
46	1
47	0
48	5
49	0
50	1
51	1
52	1
53	1
54	3
55	1
56	3
57	0
58	1
59	0
60	2
61	0
62	0
63	1
64	5
65	1
66	1
67	0
68	1
69	1
70	1
71	0
72	6
73	0
74	1
75	1
76	0
77	0
78	2
79	0
80	5
81	1
82	1
83	1
84	2
85	0
86	1

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	0
8	3
9	1
10	2
11	1
12	2
13	0
14	1
15	1
16	4
17	0
18	3
19	0
20	3
21	1
22	1
23	1
24	3
25	0
26	1
27	1
28	1
29	1
30	2
31	0
32	5
33	1
34	0
35	1
36	5
37	0
38	0
39	1
40	3
41	1
42	1
43	0
44	3
45	0
46	1
47	0
48	5
49	0
50	1
51	1
52	1
53	1
54	3
55	1
56	3
57	0
58	1
59	0
60	2
61	0
62	0
63	1
64	5
65	1
66	1
67	0
68	1
69	1
70	1
71	0
72	6
73	0
74	1
75	1
76	0
77	0
78	2
79	0
80	5
81	1
82	1
83	1
84	2
85	0
86	1

n	a(n)
1	1
2	2
3	1
4	2
5	1
6	2
7	0
8	3
9	1
10	2
11	1
12	2
13	0
14	1
15	1
16	4
17	0
18	3
19	0
20	3
21	1
22	1
23	1
24	3
25	0
26	1
27	1
28	1
29	1
30	2
31	0
32	5
33	1
34	0
35	1
36	5
37	0
38	0
39	1
40	3
41	1
42	1
43	0
44	3
45	0
46	1
47	0
48	5
49	0
50	1
51	1
52	1
53	1
54	3
55	1
56	3
57	0
58	1
59	0
60	2
61	0
62	0
63	1
64	5
65	1
66	1
67	0
68	1
69	1
70	1
71	0
72	6
73	0
74	1
75	1
76	0
77	0
78	2
79	0
80	5
81	1
82	1
83	1
84	2
85	0
86	1