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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 | 10 |
| 4 | 32 |
| 5 | 128 |
| 6 | 616 |
| 7 | 3424 |
| 8 | 21632 |
| 9 | 152000 |
| 10 | 1179904 |
| 11 | 9986560 |
| 12 | 91734656 |
| 13 | 906835712 |
| 14 | 9609378304 |
| 15 | 108540031744 |
| 16 | 1302286401536 |
| 17 | 16533214773248 |
| 18 | 221420625719296 |
| 19 | 3119382193635328 |
| 20 | 46106240358318080 |
| 21 | 713450250644701184 |
| 22 | 11531738694322683904 |
| 23 | 194362558120600797184 |
[1,2,4,10,32,128,616,3424,21632,152000,1179904, 9986560,91734656,906835712,9609378304, 108540031744,1302286401536,16533214773248, 221420625719296,3119382193635328, 46106240358318080,713450250644701184, 11531738694322683904,194362558120600797184] |