A180472 - cp's OEIS frontend

A180472 Triangle T(n, k) = OC(n, k; not -1), read by rows, where OC(n, k; not -1) is the number of k-subsets of Z_n without -1 as a multiplier, up to congruency.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	0
31	1
32	1
33	0
34	0
35	0
36	0
37	0
38	0
39	2
40	2
41	2
42	0
43	0
44	0
45	0
46	0
47	0
48	3
49	4
50	4
51	3
52	0
53	0
54	0
55	0
56	0
57	0
58	4
59	6
60	10
61	6
62	4
63	0
64	0
65	0
66	0
67	0
68	0
69	5
70	10
71	16
72	16
73	10
74	5
75	0
76	0
77	0
78	0
79	0
80	0
81	7
82	14
83	28
84	30
85	28
86	14
87	7
88	0
89	0
90	0
91	0
92	0
93	0
94	8
95	20
96	42
97	56
98	56
99	42
100	20
101	8
102	0
103	0
104	0
105	0
106	0
107	0
108	10
109	26
110	64
111	91
112	113
113	91
114	64
115	26
116	10
117	0
118	0
119	0
120	0
121	0
122	0
123	12
124	35
125	90
126	150
127	197
128	197
129	150
130	90
131	35
132	12
133	0
134	0
135	0
136	0
137	0
138	0
139	14
140	44
141	126
142	224
143	340
144	370
145	340
146	224
147	126
148	44
149	14
150	0
151	0
152	0
153	0
154	0
155	0
156	16
157	56
158	168
159	336
160	544
161	680
162	680
163	544
164	336
165	168
166	56
167	16
168	0
169	0
170	0

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 2, 2, 2, 0, 0, 0, 0, 0, 0, 3, 4, 4, 3, 0, 0, 0, 0, 0, 0, 4, 6, 10, 6, 4, 0, 0, 0, 0, 0, 0, 5, 10, 16, 16, 10, 5, 0, 0, 0, 0, 0, 0, 7, 14, 28, 30, 28, 14, 7, 0, 0, 0, 0, 0, 0, 8, 20, 42, 56, 56, 42, 20, 8, 0, 0, 0, 0, 0, 0, 10, 26, 64, 91, 113, 91, 64, 26, 10, 0, 0, 0, 0, 0, 0, 12, 35, 90, 150, 197, 197, 150, 90, 35, 12, 0, 0, 0, 0, 0, 0, 14, 44, 126, 224, 340, 370, 340, 224, 126, 44, 14, 0, 0, 0, 0, 0, 0, 16, 56, 168, 336, 544, 680, 680, 544, 336, 168, 56, 16, 0, 0, 0]

cp's OEIS Frontend

A180472 Triangle T(n, k) = OC(n, k; not -1), read by rows, where OC(n, k; not -1) is the number of k-subsets of Z_n without -1 as a multiplier, up to congruency.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	0
31	1
32	1
33	0
34	0
35	0
36	0
37	0
38	0
39	2
40	2
41	2
42	0
43	0
44	0
45	0
46	0
47	0
48	3
49	4
50	4
51	3
52	0
53	0
54	0
55	0
56	0
57	0
58	4
59	6
60	10
61	6
62	4
63	0
64	0
65	0
66	0
67	0
68	0
69	5
70	10
71	16
72	16
73	10
74	5
75	0
76	0
77	0
78	0
79	0
80	0
81	7
82	14
83	28
84	30
85	28
86	14
87	7
88	0
89	0
90	0
91	0
92	0
93	0
94	8
95	20
96	42
97	56
98	56
99	42
100	20
101	8
102	0
103	0
104	0
105	0
106	0
107	0
108	10
109	26
110	64
111	91
112	113
113	91
114	64
115	26
116	10
117	0
118	0
119	0
120	0
121	0
122	0
123	12
124	35
125	90
126	150
127	197
128	197
129	150
130	90
131	35
132	12
133	0
134	0
135	0
136	0
137	0
138	0
139	14
140	44
141	126
142	224
143	340
144	370
145	340
146	224
147	126
148	44
149	14
150	0
151	0
152	0
153	0
154	0
155	0
156	16
157	56
158	168
159	336
160	544
161	680
162	680
163	544
164	336
165	168
166	56
167	16
168	0
169	0
170	0

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	0
31	1
32	1
33	0
34	0
35	0
36	0
37	0
38	0
39	2
40	2
41	2
42	0
43	0
44	0
45	0
46	0
47	0
48	3
49	4
50	4
51	3
52	0
53	0
54	0
55	0
56	0
57	0
58	4
59	6
60	10
61	6
62	4
63	0
64	0
65	0
66	0
67	0
68	0
69	5
70	10
71	16
72	16
73	10
74	5
75	0
76	0
77	0
78	0
79	0
80	0
81	7
82	14
83	28
84	30
85	28
86	14
87	7
88	0
89	0
90	0
91	0
92	0
93	0
94	8
95	20
96	42
97	56
98	56
99	42
100	20
101	8
102	0
103	0
104	0
105	0
106	0
107	0
108	10
109	26
110	64
111	91
112	113
113	91
114	64
115	26
116	10
117	0
118	0
119	0
120	0
121	0
122	0
123	12
124	35
125	90
126	150
127	197
128	197
129	150
130	90
131	35
132	12
133	0
134	0
135	0
136	0
137	0
138	0
139	14
140	44
141	126
142	224
143	340
144	370
145	340
146	224
147	126
148	44
149	14
150	0
151	0
152	0
153	0
154	0
155	0
156	16
157	56
158	168
159	336
160	544
161	680
162	680
163	544
164	336
165	168
166	56
167	16
168	0
169	0
170	0

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	0
12	0
13	0
14	0
15	0
16	0
17	0
18	0
19	0
20	0
21	0
22	0
23	0
24	1
25	0
26	0
27	0
28	0
29	0
30	0
31	1
32	1
33	0
34	0
35	0
36	0
37	0
38	0
39	2
40	2
41	2
42	0
43	0
44	0
45	0
46	0
47	0
48	3
49	4
50	4
51	3
52	0
53	0
54	0
55	0
56	0
57	0
58	4
59	6
60	10
61	6
62	4
63	0
64	0
65	0
66	0
67	0
68	0
69	5
70	10
71	16
72	16
73	10
74	5
75	0
76	0
77	0
78	0
79	0
80	0
81	7
82	14
83	28
84	30
85	28
86	14
87	7
88	0
89	0
90	0
91	0
92	0
93	0
94	8
95	20
96	42
97	56
98	56
99	42
100	20
101	8
102	0
103	0
104	0
105	0
106	0
107	0
108	10
109	26
110	64
111	91
112	113
113	91
114	64
115	26
116	10
117	0
118	0
119	0
120	0
121	0
122	0
123	12
124	35
125	90
126	150
127	197
128	197
129	150
130	90
131	35
132	12
133	0
134	0
135	0
136	0
137	0
138	0
139	14
140	44
141	126
142	224
143	340
144	370
145	340
146	224
147	126
148	44
149	14
150	0
151	0
152	0
153	0
154	0
155	0
156	16
157	56
158	168
159	336
160	544
161	680
162	680
163	544
164	336
165	168
166	56
167	16
168	0
169	0
170	0