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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 7 |
| 4 | 38 |
| 5 | 190 |
| 6 | 918 |
| 7 | 4367 |
| 8 | 20623 |
| 9 | 97052 |
| 10 | 455960 |
| 11 | 2140404 |
| 12 | 10043697 |
| 13 | 47120343 |
| 14 | 221046178 |
| 15 | 1036902766 |
| 16 | 4863888050 |
| 17 | 22815211759 |
| 18 | 107019570351 |
| 19 | 501996648392 |
| 20 | 2354712588592 |
| 21 | 11045229346424 |
| 22 | 51809744028497 |
| 23 | 243023401329015 |
[0,1,7,38,190,918,4367,20623,97052,455960,2140404, 10043697,47120343,221046178,1036902766,4863888050, 22815211759,107019570351,501996648392, 2354712588592,11045229346424,51809744028497, 243023401329015] |