login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A131551
as a simple table
n
a(n)
1
3
2
19
3
148
4
253
5
330
6
2380
7
2124
8
30598
9
22791
10
238582
11
107187
12
1521134
13
10363119
14
9995030
15
68353787
[3,19,148,253,330,2380,2124,30598,22791,238582, 107187,1521134,10363119,9995030,68353787]