login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A333004
as a simple table
n
a(n)
0
1
1
2
2
5
3
26
4
130
5
670
6
3466
7
17985
8
93179
9
482762
10
2501013
11
12956855
12
67125243
13
347753857
14
1801596939
[1,2,5,26,130,670,3466,17985,93179,482762,2501013, 12956855,67125243,347753857,1801596939]