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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 | 4 |
| 3 | 9 |
| 4 | 24 |
| 5 | 97 |
| 6 | 534 |
| 7 | 2975 |
| 8 | 16520 |
| 9 | 114217 |
| 10 | 1017914 |
| 11 | 8693355 |
| 12 | 66612612 |
| 13 | 641356549 |
| 14 | 8612481206 |
| 15 | 99659748575 |
| 16 | 839464647792 |
| 17 | 10015783072433 |
| 18 | 223263066398386 |
| 19 | 3322983000373651 |
| 20 | 20349154329810172 |
[1,2,4,9,24,97,534,2975,16520,114217,1017914, 8693355,66612612,641356549,8612481206,99659748575, 839464647792,10015783072433,223263066398386, 3322983000373651,20349154329810172] |