A098623 - cp's OEIS frontend

A098623 Consider the family of directed multigraphs enriched by the species of set partitions. Sequence gives number of those multigraphs with n labeled arcs.

n	a(n)
0	1
1	1
2	8
3	109
4	2229
5	62684
6	2289151
7	104344153
8	5767234550
9	378073098155
10	28888082263581
11	2536660090249102
12	253007765488793325
13	28383529110762969901
14	3551558435250676339536
15	492092920443604792460905
16	75025155137863150912784409
17	12516480979952118669729618300

[1, 1, 8, 109, 2229, 62684, 2289151, 104344153, 5767234550, 378073098155, 28888082263581, 2536660090249102, 253007765488793325, 28383529110762969901, 3551558435250676339536, 492092920443604792460905, 75025155137863150912784409, 12516480979952118669729618300]

cp's OEIS Frontend

A098623 Consider the family of directed multigraphs enriched by the species of set partitions. Sequence gives number of those multigraphs with n labeled arcs.

Table of values

List of values