A157570 - 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

A157570 as a simple table

n	a(n)
2	1
3	9
4	114
5	11430
6	928665
7	57312801
8	2929653363
9	133959064275
10	6012597282660
11	258520740868390
12	10793900036914731
13	439085564014381089
14	17106142080255638592
15	634240156516816014270
16	22487281301691416873070

[1,9,114,11430,928665,57312801,2929653363, 133959064275,6012597282660,258520740868390, 10793900036914731,439085564014381089, 17106142080255638592,634240156516816014270, 22487281301691416873070]