A012519 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A012519 as a simple table

n	a(n)
0	0
1	1
2	2
3	5
4	20
5	125
6	1022
7	10145
8	119240
9	1621625
10	25018202
11	431595485
12	8233157660
13	172077583925
14	3910293621782
15	95985774268025
16	2531103994315280
17	71356674948823025
18	2141700448802291762

[0,1,2,5,20,125,1022,10145,119240,1621625, 25018202,431595485,8233157660,172077583925, 3910293621782,95985774268025,2531103994315280, 71356674948823025,2141700448802291762]