The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 39 |
| 4 | 100 |
| 5 | 3305 |
| 6 | 54726 |
| 7 | 958447 |
| 8 | 2392776 |
| 9 | 5375169 |
| 10 | 10011102310 |
| 11 | 311270518031 |
| 12 | 804967791420 |
| 13 | 304805198256481 |
| 14 | 11910060539653290 |
| 15 | 469042238075266815 |
| 16 | 1229501390272865296 |
| 17 | 830281003630789139585 |
| 18 | 2193053904527215207698 |
| 19 | 1983916064827419873906079 |
[1,6,39,100,3305,54726,958447,2392776,5375169, 10011102310,311270518031,804967791420, 304805198256481,11910060539653290, 469042238075266815,1229501390272865296, 830281003630789139585,2193053904527215207698, 1983916064827419873906079] |