A372173 - cp's OEIS frontend

A372173 Irregular triangle read by rows where T(n,k) is the number of unlabeled simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3).

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	0
9	1
10	7
11	5
12	4
13	2
14	2
15	1
16	0
17	1
18	0
19	0
20	1
21	24
22	16
23	23
24	12
25	15
26	8
27	7
28	4
29	4
30	1
31	3
32	1
33	1
34	1
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	69
43	79
44	113
45	103
46	105
47	83
48	73
49	58
50	45
51	34
52	31
53	22
54	14
55	16
56	10
57	4
58	8
59	5
60	2
61	3
62	2
63	2
64	2
65	1
66	0
67	1
68	1
69	0
70	0
71	0
72	1
73	0
74	0
75	0
76	0
77	1

[1, 0, 1, 1, 1, 4, 1, 1, 0, 1, 7, 5, 4, 2, 2, 1, 0, 1, 0, 0, 1, 24, 16, 23, 12, 15, 8, 7, 4, 4, 1, 3, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 69, 79, 113, 103, 105, 83, 73, 58, 45, 34, 31, 22, 14, 16, 10, 4, 8, 5, 2, 3, 2, 2, 2, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A372173 Irregular triangle read by rows where T(n,k) is the number of unlabeled simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3).

Table of values

List of values

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	0
9	1
10	7
11	5
12	4
13	2
14	2
15	1
16	0
17	1
18	0
19	0
20	1
21	24
22	16
23	23
24	12
25	15
26	8
27	7
28	4
29	4
30	1
31	3
32	1
33	1
34	1
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	69
43	79
44	113
45	103
46	105
47	83
48	73
49	58
50	45
51	34
52	31
53	22
54	14
55	16
56	10
57	4
58	8
59	5
60	2
61	3
62	2
63	2
64	2
65	1
66	0
67	1
68	1
69	0
70	0
71	0
72	1
73	0
74	0
75	0
76	0
77	1

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	0
9	1
10	7
11	5
12	4
13	2
14	2
15	1
16	0
17	1
18	0
19	0
20	1
21	24
22	16
23	23
24	12
25	15
26	8
27	7
28	4
29	4
30	1
31	3
32	1
33	1
34	1
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	69
43	79
44	113
45	103
46	105
47	83
48	73
49	58
50	45
51	34
52	31
53	22
54	14
55	16
56	10
57	4
58	8
59	5
60	2
61	3
62	2
63	2
64	2
65	1
66	0
67	1
68	1
69	0
70	0
71	0
72	1
73	0
74	0
75	0
76	0
77	1

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	4
6	1
7	1
8	0
9	1
10	7
11	5
12	4
13	2
14	2
15	1
16	0
17	1
18	0
19	0
20	1
21	24
22	16
23	23
24	12
25	15
26	8
27	7
28	4
29	4
30	1
31	3
32	1
33	1
34	1
35	0
36	0
37	1
38	0
39	0
40	0
41	1
42	69
43	79
44	113
45	103
46	105
47	83
48	73
49	58
50	45
51	34
52	31
53	22
54	14
55	16
56	10
57	4
58	8
59	5
60	2
61	3
62	2
63	2
64	2
65	1
66	0
67	1
68	1
69	0
70	0
71	0
72	1
73	0
74	0
75	0
76	0
77	1