login

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

A021684 as a simple table

na(n)
01
123
2360
34810
459111
5690573
67801990
786089520
8933531621
99989073523
10105774639620
111110701801430
1211583617458531
13120125571974873
141239860303429250
1512746044308940540
16130587414625807841

[1,23,360,4810,59111,690573,7801990,86089520,
 933531621,9989073523,105774639620,1110701801430,
 11583617458531,120125571974873,1239860303429250,
 12746044308940540,130587414625807841]