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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 117 |
| 4 | 3184 |
| 5 | 134025 |
| 6 | 8141436 |
| 7 | 672837277 |
| 8 | 72634878016 |
| 9 | 9923765772177 |
| 10 | 1673881314096700 |
| 11 | 341631408064928421 |
| 12 | 82978986493779894288 |
| 13 | 23653894531273155603961 |
| 14 | 7819996460332550715977588 |
| 15 | 2967815528758036870644773925 |
| 16 | 1281517958938232539844046259456 |
[1,1,8,117,3184,134025,8141436,672837277, 72634878016,9923765772177,1673881314096700, 341631408064928421,82978986493779894288, 23653894531273155603961,7819996460332550715977588, 2967815528758036870644773925, 1281517958938232539844046259456] |