Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 2 |
3 | 2 |
4 | 8 |
5 | 25 |
6 | 90 |
7 | 404 |
8 | 2055 |
9 | 11792 |
10 | 75053 |
11 | 525622 |
12 | 4015361 |
13 | 33231679 |
14 | 296182315 |
15 | 2828335731 |
16 | 28809181418 |
17 | 311788442591 |
18 | 3572832236720 |
19 | 43216177809190 |
20 | 550245463265240 |
21 | 7356239983352887 |
22 | 103028812072639378 |
[1,2,2,2,8,25,90,404,2055,11792,75053,525622, 4015361,33231679,296182315,2828335731,28809181418, 311788442591,3572832236720,43216177809190, 550245463265240,7356239983352887, 103028812072639378] |