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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 | 3 |
| 2 | 20 |
| 3 | 200 |
| 4 | 2666 |
| 5 | 44422 |
| 6 | 888214 |
| 7 | 20719722 |
| 8 | 552385386 |
| 9 | 16567346630 |
| 10 | 552104425070 |
| 11 | 20238679934002 |
| 12 | 809341290336274 |
| 13 | 35062535546332062 |
| 14 | 1635835480858764342 |
| 15 | 81770970437144725034 |
| 16 | 4360009179878123161658 |
| 17 | 247004345719314584973430 |
[1,3,20,200,2666,44422,888214,20719722,552385386, 16567346630,552104425070,20238679934002, 809341290336274,35062535546332062, 1635835480858764342,81770970437144725034, 4360009179878123161658,247004345719314584973430] |