login

A086677 as a simple table

na(n)
21
34
431
5360
65625
7110880
82643795
974035080
102382538725
1186656878000
123515761193175
13157425426358200
147711961781949425
15410298436511964000
1623559634669682986875
171452240056377167057000
1895649328231839993736125

[1,4,31,360,5625,110880,2643795,74035080,
 2382538725,86656878000,3515761193175,
 157425426358200,7711961781949425,
 410298436511964000,23559634669682986875,
 1452240056377167057000,95649328231839993736125]