The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 33 |
| 3 | 352 |
| 4 | 3721 |
| 5 | 39254 |
| 6 | 413908 |
| 7 | 4363921 |
| 8 | 46008619 |
| 9 | 485064009 |
| 10 | 5113971944 |
| 11 | 53915979657 |
| 12 | 568429529006 |
| 13 | 5992882377940 |
| 14 | 63182219138721 |
| 15 | 666122336505939 |
| 16 | 7022845559348401 |
| 17 | 74040993741513520 |
| 18 | 780605056433123273 |
[3,33,352,3721,39254,413908,4363921,46008619, 485064009,5113971944,53915979657,568429529006, 5992882377940,63182219138721,666122336505939, 7022845559348401,74040993741513520, 780605056433123273] |