login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A363004
as a simple table
n
a(n)
0
1
1
1
2
1
3
1
4
2
5
7
6
40
7
355
8
4819
9
99242
10
3049155
11
138762035
[1,1,1,1,2,7,40,355,4819,99242,3049155,138762035]