login

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

A209020 as a simple table

na(n)
10
21
31
43
53
616
721
871
9114
10305
11581
121437
132980
146856
1514671
1632681
1770376
18156129
19340985
20753249
211642055
223601624
237879835
2417280310
2537865836
2683031844
27181895623
28398628603
29873357406
301913797135
314194416039
329193647288

[0,1,1,3,3,16,21,71,114,305,581,1437,2980,6856,
 14671,32681,70376,156129,340985,753249,1642055,
 3601624,7879835,17280310,37865836,83031844,
 181895623,398628603,873357406,1913797135,
 4194416039,9193647288]