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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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 21 |
| 8 | 266 |
| 9 | 2646 |
| 10 | 22827 |
| 11 | 179487 |
| 12 | 1323651 |
| 13 | 9321312 |
| 14 | 63436352 |
| 15 | 420693273 |
| 16 | 2734926292 |
| 17 | 17505749898 |
| 18 | 110687248392 |
| 19 | 693081601779 |
| 20 | 4306078872557 |
| 21 | 26585679462783 |
| 22 | 163305339165738 |
| 23 | 998969857983405 |
[0,0,0,0,0,1,21,266,2646,22827,179487,1323651, 9321312,63436352,420693273,2734926292,17505749898, 110687248392,693081601779,4306078872557, 26585679462783,163305339165738,998969857983405] |