A372167 - cp's OEIS frontend

A372167 Irregular triangle read by rows where T(n,k) is the number of simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3).

n	a(n)
0	1
1	0
2	1
3	3
4	1
5	22
6	12
7	6
8	0
9	1
10	237
11	220
12	165
13	70
14	35
15	30
16	0
17	10
18	0
19	0
20	1
21	3961
22	5460
23	5830
24	4140
25	2805
26	2112
27	1230
28	720
29	600
30	180
31	230
32	60
33	45
34	60
35	0
36	0
37	15
38	0
39	0
40	0
41	1
42	99900
43	191975
44	269220
45	272055
46	240485
47	207095
48	166005
49	121530
50	98770
51	65905
52	48503
53	37065
54	20055
55	17570
56	11445
57	6552
58	4410
59	3570
60	1680
61	1785
62	147
63	735
64	455
65	140
66	0
67	105
68	105
69	0
70	0
71	0
72	21
73	0
74	0
75	0
76	0
77	1

[1, 0, 1, 3, 1, 22, 12, 6, 0, 1, 237, 220, 165, 70, 35, 30, 0, 10, 0, 0, 1, 3961, 5460, 5830, 4140, 2805, 2112, 1230, 720, 600, 180, 230, 60, 45, 60, 0, 0, 15, 0, 0, 0, 1, 99900, 191975, 269220, 272055, 240485, 207095, 166005, 121530, 98770, 65905, 48503, 37065, 20055, 17570, 11445, 6552, 4410, 3570, 1680, 1785, 147, 735, 455, 140, 0, 105, 105, 0, 0, 0, 21, 0, 0, 0, 0, 1]

cp's OEIS Frontend

A372167 Irregular triangle read by rows where T(n,k) is the number of simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3).

Table of values

List of values