A061721 - cp's OEIS frontend

A061721 Number of zeros in the character table of the dihedral group with 2n elements.

n	a(n)
1	0
2	0
3	1
4	3
5	2
6	4
7	3
8	10
9	4
10	8
11	5
12	15
13	6
14	12
15	7
16	26
17	8
18	16
19	9
20	27
21	10
22	20
23	11
24	42
25	12
26	24
27	13
28	39
29	14
30	28
31	15
32	62
33	16
34	32
35	17
36	55
37	18
38	36
39	19
40	74
41	20
42	40
43	21
44	63
45	22
46	44
47	23
48	106
49	24
50	48
51	25
52	75
53	26
54	52
55	27
56	106
57	28
58	56
59	29
60	103
61	30
62	60
63	31
64	142
65	32
66	64
67	33
68	99

[0, 0, 1, 3, 2, 4, 3, 10, 4, 8, 5, 15, 6, 12, 7, 26, 8, 16, 9, 27, 10, 20, 11, 42, 12, 24, 13, 39, 14, 28, 15, 62, 16, 32, 17, 55, 18, 36, 19, 74, 20, 40, 21, 63, 22, 44, 23, 106, 24, 48, 25, 75, 26, 52, 27, 106, 28, 56, 29, 103, 30, 60, 31, 142, 32, 64, 33, 99]

cp's OEIS Frontend

A061721 Number of zeros in the character table of the dihedral group with 2n elements.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	3
5	2
6	4
7	3
8	10
9	4
10	8
11	5
12	15
13	6
14	12
15	7
16	26
17	8
18	16
19	9
20	27
21	10
22	20
23	11
24	42
25	12
26	24
27	13
28	39
29	14
30	28
31	15
32	62
33	16
34	32
35	17
36	55
37	18
38	36
39	19
40	74
41	20
42	40
43	21
44	63
45	22
46	44
47	23
48	106
49	24
50	48
51	25
52	75
53	26
54	52
55	27
56	106
57	28
58	56
59	29
60	103
61	30
62	60
63	31
64	142
65	32
66	64
67	33
68	99

n	a(n)
1	0
2	0
3	1
4	3
5	2
6	4
7	3
8	10
9	4
10	8
11	5
12	15
13	6
14	12
15	7
16	26
17	8
18	16
19	9
20	27
21	10
22	20
23	11
24	42
25	12
26	24
27	13
28	39
29	14
30	28
31	15
32	62
33	16
34	32
35	17
36	55
37	18
38	36
39	19
40	74
41	20
42	40
43	21
44	63
45	22
46	44
47	23
48	106
49	24
50	48
51	25
52	75
53	26
54	52
55	27
56	106
57	28
58	56
59	29
60	103
61	30
62	60
63	31
64	142
65	32
66	64
67	33
68	99

n	a(n)
1	0
2	0
3	1
4	3
5	2
6	4
7	3
8	10
9	4
10	8
11	5
12	15
13	6
14	12
15	7
16	26
17	8
18	16
19	9
20	27
21	10
22	20
23	11
24	42
25	12
26	24
27	13
28	39
29	14
30	28
31	15
32	62
33	16
34	32
35	17
36	55
37	18
38	36
39	19
40	74
41	20
42	40
43	21
44	63
45	22
46	44
47	23
48	106
49	24
50	48
51	25
52	75
53	26
54	52
55	27
56	106
57	28
58	56
59	29
60	103
61	30
62	60
63	31
64	142
65	32
66	64
67	33
68	99