Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
1 | 1 |
2 | 0 |
3 | 1 |
4 | 1 |
5 | 3 |
6 | 6 |
7 | 9 |
8 | 15 |
9 | 40 |
10 | 90 |
11 | 105 |
12 | 359 |
13 | 355 |
14 | 1092 |
15 | 3007 |
16 | 2152 |
17 | 4305 |
18 | 17826 |
19 | 15267 |
20 | 48549 |
21 | 130839 |
22 | 170820 |
23 | 198753 |
24 | 780645 |
[1,0,1,1,3,6,9,15,40,90,105,359,355,1092,3007, 2152,4305,17826,15267,48549,130839,170820,198753, 780645] |