login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

A172857 as a simple table

na(n)
10
20
3120
4838792
539205553940
68867410986416760
78131811998479859238220
826150377893243567040474379136
9261894259231474231217142097747097616
107402668628365416446775191706258616053932800

[0,0,120,838792,39205553940,8867410986416760,
 8131811998479859238220,
 26150377893243567040474379136,
 261894259231474231217142097747097616,
 7402668628365416446775191706258616053932800]