| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 9 |
| 5 | 98 |
| 6 | 2981 |
| 7 | 340549 |
| 8 | 216569887 |
| 9 | 994441978397 |
| 10 | 36812710172987995 |
| 11 | 12001387004225881846755 |
| 12 | 37783429241635794906272195147 |
| 13 | 1255674108542254217846031366276646429 |
| 14 | 478743486470659944952229546087586449114251007 |
| 15 | 2262324605850021060149051111359520226936424091385392945 |
[1,1,1,2,9,98,2981,340549,216569887,994441978397, 36812710172987995,12001387004225881846755, 37783429241635794906272195147, 1255674108542254217846031366276646429, 478743486470659944952229546087586449114251007, 22623246058500210601490511113595202269364240913853\ 92945] |