Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 10 |
2 | 90 |
3 | 710 |
4 | 5250 |
5 | 37072 |
6 | 253330 |
7 | 1688640 |
8 | 11039370 |
9 | 71049200 |
10 | 451429880 |
11 | 2837585940 |
12 | 17674206130 |
13 | 109224234420 |
14 | 670398280520 |
15 | 4090210956596 |
16 | 24823230801450 |
17 | 149941593205140 |
18 | 901881446152120 |
19 | 5404072772837620 |
20 | 32269536034506456 |
21 | 192087243952281920 |
[1,10,90,710,5250,37072,253330,1688640,11039370, 71049200,451429880,2837585940,17674206130, 109224234420,670398280520,4090210956596, 24823230801450,149941593205140,901881446152120, 5404072772837620,32269536034506456, 192087243952281920] |