The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 27 |
| 2 | 573 |
| 3 | 11014 |
| 4 | 200430 |
| 5 | 3522192 |
| 6 | 60410931 |
| 7 | 1017759852 |
| 8 | 16912317690 |
| 9 | 277987524585 |
| 10 | 4528956441933 |
| 11 | 73245184338192 |
| 12 | 1177252129217840 |
| 13 | 18821776752970380 |
| 14 | 299546153329805190 |
| 15 | 4748217853797986904 |
| 16 | 75001137437207696130 |
| 17 | 1180992084793962172290 |
[1,27,573,11014,200430,3522192,60410931, 1017759852,16912317690,277987524585,4528956441933, 73245184338192,1177252129217840,18821776752970380, 299546153329805190,4748217853797986904, 75001137437207696130,1180992084793962172290] |