A173987 - 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

A173987 as a simple table

n	a(n)
0	1
1	4
2	100
3	1600
4	193600
5	9486400
6	2741569600
7	2741569600
8	1450290318400
9	245099063809600
10	206128312663873600
11	3298053002621977600
12	3298053002621977600
13	1190597133946533913600
14	2001393782164123508761600

[1,4,100,1600,193600,9486400,2741569600, 2741569600,1450290318400,245099063809600, 206128312663873600,3298053002621977600, 3298053002621977600,1190597133946533913600, 2001393782164123508761600]