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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1512 |
| 2 | 13477464 |
| 3 | 156037527360 |
| 4 | 2018989675062360 |
| 5 | 27791880541579666512 |
| 6 | 397974308267103144857280 |
| 7 | 5857301482132559510090140920 |
| 8 | 87960819866039245485380114158680 |
| 9 | 1341476995616395775866469804150505600 |
| 10 | 20709814202640945368698086671062023292464 |
| 11 | 322897098547446926110838713561401344838974976 |
[1,1512,13477464,156037527360,2018989675062360, 27791880541579666512,397974308267103144857280, 5857301482132559510090140920, 87960819866039245485380114158680, 1341476995616395775866469804150505600, 20709814202640945368698086671062023292464, 322897098547446926110838713561401344838974976] |