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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 48 |
| 2 | 1175 |
| 3 | 19552 |
| 4 | 248723 |
| 5 | 2579312 |
| 6 | 22706404 |
| 7 | 174482000 |
| 8 | 1194358970 |
| 9 | 7396268880 |
| 10 | 41942496051 |
| 11 | 219939217728 |
| 12 | 1075086490926 |
| 13 | 4931595192160 |
| 14 | 21350092231441 |
| 15 | 87658196804688 |
| 16 | 342762976614961 |
| 17 | 1281150739056160 |
[1,48,1175,19552,248723,2579312,22706404, 174482000,1194358970,7396268880,41942496051, 219939217728,1075086490926,4931595192160, 21350092231441,87658196804688,342762976614961, 1281150739056160] |