Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
n | a(n) |
---|---|
0 | 0 |
1 | 3 |
2 | 12 |
3 | 66 |
4 | 309 |
5 | 1524 |
6 | 7356 |
7 | 35787 |
8 | 173568 |
9 | 842790 |
10 | 4090485 |
11 | 19856568 |
12 | 96384072 |
13 | 467861331 |
14 | 2271040644 |
15 | 11023873914 |
16 | 53510987541 |
17 | 259747827852 |
18 | 1260842371428 |
19 | 6120257564955 |
20 | 29708354037720 |
21 | 144207380197758 |
[0,3,12,66,309,1524,7356,35787,173568,842790, 4090485,19856568,96384072,467861331,2271040644, 11023873914,53510987541,259747827852, 1260842371428,6120257564955,29708354037720, 144207380197758] |