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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 | 4 |
| 2 | 16 |
| 3 | 320 |
| 4 | 4430 |
| 5 | 40872 |
| 6 | 463106 |
| 7 | 5675188 |
| 8 | 63422950 |
| 9 | 710698093 |
| 10 | 8200538232 |
| 11 | 93691594514 |
| 12 | 1063586983374 |
| 13 | 12137123569004 |
| 14 | 138570852491100 |
| 15 | 1579149122960061 |
| 16 | 18003479738145524 |
| 17 | 205351456145093852 |
| 18 | 2341614891431192875 |
| 19 | 26699543185422994944 |
| 20 | 304468247045695911612 |
[1,4,16,320,4430,40872,463106,5675188,63422950, 710698093,8200538232,93691594514,1063586983374, 12137123569004,138570852491100,1579149122960061, 18003479738145524,205351456145093852, 2341614891431192875,26699543185422994944, 304468247045695911612] |