Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 20 |
5 | 72 |
6 | 290 |
7 | 1198 |
8 | 5452 |
9 | 25176 |
10 | 125874 |
11 | 637926 |
12 | 3448708 |
13 | 18919048 |
14 | 109412210 |
15 | 642798510 |
16 | 3945170012 |
17 | 24614491704 |
18 | 159328958690 |
19 | 1048645656646 |
20 | 7122719571700 |
21 | 49185991168968 |
22 | 349097516604738 |
23 | 2518145666958126 |
24 | 18609525157571692 |
25 | 139704193446510616 |
[1,2,6,20,72,290,1198,5452,25176,125874,637926, 3448708,18919048,109412210,642798510,3945170012, 24614491704,159328958690,1048645656646, 7122719571700,49185991168968,349097516604738, 2518145666958126,18609525157571692, 139704193446510616] |