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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 18 |
| 2 | 120 |
| 3 | 500 |
| 4 | 1575 |
| 5 | 4116 |
| 6 | 9408 |
| 7 | 19440 |
| 8 | 37125 |
| 9 | 66550 |
| 10 | 113256 |
| 11 | 184548 |
| 12 | 289835 |
| 13 | 441000 |
| 14 | 652800 |
| 15 | 943296 |
| 16 | 1334313 |
| 17 | 1851930 |
| 18 | 2527000 |
| 19 | 3395700 |
| 20 | 4500111 |
| 21 | 5888828 |
| 22 | 7617600 |
| 23 | 9750000 |
| 24 | 12358125 |
| 25 | 15523326 |
| 26 | 19336968 |
| 27 | 23901220 |
| 28 | 29329875 |
| 29 | 35749200 |
[1,18,120,500,1575,4116,9408,19440,37125,66550, 113256,184548,289835,441000,652800,943296,1334313, 1851930,2527000,3395700,4500111,5888828,7617600, 9750000,12358125,15523326,19336968,23901220, 29329875,35749200] |