login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A332748
as a simple table
n
a(n)
0
1
1
1
2
4
3
18
4
124
5
738
6
7464
7
55890
8
668778
9
7030210
10
90713844
11
1054221258
12
18597735744
13
242795838520
[1,1,4,18,124,738,7464,55890,668778,7030210, 90713844,1054221258,18597735744,242795838520]