A369196 - cp's OEIS frontend

A369196 Number of labeled loop-graphs with n vertices and at most as many edges as covered vertices.

n	a(n)
0	1
1	2
2	7
3	39
4	320
5	3584
6	51405
7	900947
8	18661186
9	445827942
10	12062839691
11	364451604095
12	12157649050827
13	443713171974080
14	17583351295466338
15	751745326170662049
16	34485624653535808340
17	1689485711682987916502
18	88030098291829749593643
19	4860631073631586486397141

[1, 2, 7, 39, 320, 3584, 51405, 900947, 18661186, 445827942, 12062839691, 364451604095, 12157649050827, 443713171974080, 17583351295466338, 751745326170662049, 34485624653535808340, 1689485711682987916502, 88030098291829749593643, 4860631073631586486397141]

cp's OEIS Frontend

A369196 Number of labeled loop-graphs with n vertices and at most as many edges as covered vertices.

Table of values

List of values