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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 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 68 |
| 7 | 389 |
| 8 | 1542 |
| 9 | 24810 |
| 10 | 251564 |
| 11 | 1814487 |
| 12 | 27520734 |
| 13 | 391640548 |
| 14 | 4295115396 |
| 15 | 69305652406 |
| 16 | 1221344986380 |
| 17 | 18207710383335 |
| 18 | 329699350020676 |
| 19 | 6759819628538561 |
| 20 | 126950556666301050 |
| 21 | 2624697847966227077 |
| 22 | 60825028694289947940 |
| 23 | 1365568620213461601924 |
[1,0,0,1,2,3,68,389,1542,24810,251564,1814487, 27520734,391640548,4295115396,69305652406, 1221344986380,18207710383335,329699350020676, 6759819628538561,126950556666301050, 2624697847966227077,60825028694289947940, 1365568620213461601924] |