The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 73 |
| 2 | 597 |
| 3 | 4881 |
| 4 | 39909 |
| 5 | 326313 |
| 6 | 2668077 |
| 7 | 21815361 |
| 8 | 178371909 |
| 9 | 1458446553 |
| 10 | 11924895357 |
| 11 | 97503147441 |
| 12 | 797228275509 |
| 13 | 6518486222793 |
| 14 | 53297987467437 |
| 15 | 435787600217121 |
| 16 | 3563189559812709 |
| 17 | 29134192512207033 |
| 18 | 238213869649684317 |
[73,597,4881,39909,326313,2668077,21815361, 178371909,1458446553,11924895357,97503147441, 797228275509,6518486222793,53297987467437, 435787600217121,3563189559812709, 29134192512207033,238213869649684317] |