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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 | 2 |
| 2 | 13 |
| 3 | 98 |
| 4 | 884 |
| 5 | 8712 |
| 6 | 92033 |
| 7 | 1022450 |
| 8 | 11819620 |
| 9 | 141052808 |
| 10 | 1727897780 |
| 11 | 21634496072 |
| 12 | 275950213712 |
| 13 | 3576314656800 |
| 14 | 46995009879033 |
| 15 | 625082413914450 |
| 16 | 8403885788094500 |
| 17 | 114069363868845000 |
| 18 | 1561609591376307572 |
[1,2,13,98,884,8712,92033,1022450,11819620, 141052808,1727897780,21634496072,275950213712, 3576314656800,46995009879033,625082413914450, 8403885788094500,114069363868845000, 1561609591376307572] |