Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 1 |
4 | 3 |
5 | 13 |
6 | 68 |
7 | 426 |
8 | 3103 |
9 | 25751 |
10 | 239484 |
11 | 2466678 |
12 | 27873457 |
13 | 342843515 |
14 | 4559818741 |
15 | 65205407995 |
16 | 997642742322 |
17 | 16261576699845 |
18 | 281325276907304 |
19 | 5148252567403659 |
20 | 99361274550890614 |
21 | 2017033873383079454 |
[1,1,1,1,3,13,68,426,3103,25751,239484,2466678, 27873457,342843515,4559818741,65205407995, 997642742322,16261576699845,281325276907304, 5148252567403659,99361274550890614, 2017033873383079454] |