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A338142 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 9 |
| 5 | 6 |
| 6 | 1 |
| 7 | 216 |
| 8 | 22164 |
| 9 | 613804 |
| 10 | 6901425 |
| 11 | 39713430 |
| 12 | 131754420 |
| 13 | 267165360 |
| 14 | 336798000 |
| 15 | 257796000 |
| 16 | 109771200 |
| 17 | 19958400 |
| 18 | 1 |
| 19 | 22409618 |
| 20 | 9651132365418 |
| 21 | 96038196404417832 |
| 22 | 120785673234798359850 |
[1,1,4,9,6,1,216,22164,613804,6901425,39713430, 131754420,267165360,336798000,257796000,109771200, 19958400,1,22409618,9651132365418, 96038196404417832,120785673234798359850] |