A341941 - cp's OEIS frontend

A341941 T(n,k) is the number of unlabeled even graphs with n vertices and k edges; irregular triangular array T read by rows (n >= 0, 0 <= k <= n*(n-1)/2).

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	1
16	0
17	0
18	1
19	1
20	1
21	1
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	1
32	3
33	2
34	2
35	1
36	2
37	1
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	1
46	1
47	1
48	3
49	4
50	4
51	6
52	6
53	6
54	6
55	4
56	4
57	3
58	1
59	1
60	1
61	0
62	0
63	1
64	1
65	0
66	0
67	1
68	1
69	1
70	3
71	4
72	7
73	9
74	16
75	18
76	25
77	24
78	29
79	26
80	25
81	16
82	15
83	8
84	5
85	4
86	3
87	1
88	1
89	0
90	0
91	0
92	0
93	1
94	0
95	0
96	1
97	1
98	1
99	3
100	4
101	7
102	13
103	21
104	36
105	58
106	83
107	118
108	156
109	189
110	213
111	228
112	213
113	189
114	156
115	118
116	83
117	58
118	36
119	21
120	13
121	7
122	4
123	3
124	1
125	1
126	1
127	0
128	0
129	1

[1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 3, 2, 2, 1, 2, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 3, 4, 4, 6, 6, 6, 6, 4, 4, 3, 1, 1, 1, 0, 0, 1, 1, 0, 0, 1, 1, 1, 3, 4, 7, 9, 16, 18, 25, 24, 29, 26, 25, 16, 15, 8, 5, 4, 3, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 1, 3, 4, 7, 13, 21, 36, 58, 83, 118, 156, 189, 213, 228, 213, 189, 156, 118, 83, 58, 36, 21, 13, 7, 4, 3, 1, 1, 1, 0, 0, 1]

cp's OEIS Frontend

A341941 T(n,k) is the number of unlabeled even graphs with n vertices and k edges; irregular triangular array T read by rows (n >= 0, 0 <= k <= n*(n-1)/2).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	1
16	0
17	0
18	1
19	1
20	1
21	1
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	1
32	3
33	2
34	2
35	1
36	2
37	1
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	1
46	1
47	1
48	3
49	4
50	4
51	6
52	6
53	6
54	6
55	4
56	4
57	3
58	1
59	1
60	1
61	0
62	0
63	1
64	1
65	0
66	0
67	1
68	1
69	1
70	3
71	4
72	7
73	9
74	16
75	18
76	25
77	24
78	29
79	26
80	25
81	16
82	15
83	8
84	5
85	4
86	3
87	1
88	1
89	0
90	0
91	0
92	0
93	1
94	0
95	0
96	1
97	1
98	1
99	3
100	4
101	7
102	13
103	21
104	36
105	58
106	83
107	118
108	156
109	189
110	213
111	228
112	213
113	189
114	156
115	118
116	83
117	58
118	36
119	21
120	13
121	7
122	4
123	3
124	1
125	1
126	1
127	0
128	0
129	1

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	1
16	0
17	0
18	1
19	1
20	1
21	1
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	1
32	3
33	2
34	2
35	1
36	2
37	1
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	1
46	1
47	1
48	3
49	4
50	4
51	6
52	6
53	6
54	6
55	4
56	4
57	3
58	1
59	1
60	1
61	0
62	0
63	1
64	1
65	0
66	0
67	1
68	1
69	1
70	3
71	4
72	7
73	9
74	16
75	18
76	25
77	24
78	29
79	26
80	25
81	16
82	15
83	8
84	5
85	4
86	3
87	1
88	1
89	0
90	0
91	0
92	0
93	1
94	0
95	0
96	1
97	1
98	1
99	3
100	4
101	7
102	13
103	21
104	36
105	58
106	83
107	118
108	156
109	189
110	213
111	228
112	213
113	189
114	156
115	118
116	83
117	58
118	36
119	21
120	13
121	7
122	4
123	3
124	1
125	1
126	1
127	0
128	0
129	1

n	a(n)
0	1
1	1
2	1
3	0
4	1
5	0
6	0
7	1
8	1
9	0
10	0
11	1
12	1
13	0
14	0
15	1
16	0
17	0
18	1
19	1
20	1
21	1
22	1
23	0
24	0
25	1
26	1
27	0
28	0
29	1
30	1
31	1
32	3
33	2
34	2
35	1
36	2
37	1
38	1
39	0
40	0
41	0
42	1
43	0
44	0
45	1
46	1
47	1
48	3
49	4
50	4
51	6
52	6
53	6
54	6
55	4
56	4
57	3
58	1
59	1
60	1
61	0
62	0
63	1
64	1
65	0
66	0
67	1
68	1
69	1
70	3
71	4
72	7
73	9
74	16
75	18
76	25
77	24
78	29
79	26
80	25
81	16
82	15
83	8
84	5
85	4
86	3
87	1
88	1
89	0
90	0
91	0
92	0
93	1
94	0
95	0
96	1
97	1
98	1
99	3
100	4
101	7
102	13
103	21
104	36
105	58
106	83
107	118
108	156
109	189
110	213
111	228
112	213
113	189
114	156
115	118
116	83
117	58
118	36
119	21
120	13
121	7
122	4
123	3
124	1
125	1
126	1
127	0
128	0
129	1