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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 | 89 |
| 6 | 438 |
| 7 | 2527 |
| 8 | 16072 |
| 9 | 111257 |
| 10 | 851866 |
| 11 | 7138923 |
| 12 | 65286276 |
| 13 | 641779181 |
| 14 | 6769229670 |
| 15 | 76040241775 |
| 16 | 908362886512 |
| 17 | 11481062493713 |
| 18 | 153172480730482 |
| 19 | 2149793170916115 |
| 20 | 31664861861245692 |
[1,2,4,9,24,89,438,2527,16072,111257,851866, 7138923,65286276,641779181,6769229670,76040241775, 908362886512,11481062493713,153172480730482, 2149793170916115,31664861861245692] |