The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 398 |
| 3 | 5162 |
| 4 | 59619 |
| 5 | 640227 |
| 6 | 6549376 |
| 7 | 64780804 |
| 8 | 625573157 |
| 9 | 5936696909 |
| 10 | 55620675474 |
| 11 | 516146265726 |
| 12 | 4755391291015 |
| 13 | 43574880995671 |
| 14 | 397637888433092 |
| 15 | 3617137005125528 |
| 16 | 32823750870307593 |
| 17 | 297304128579802113 |
| 18 | 2688988551055876630 |
| 19 | 24293750984286505810 |
[1,25,398,5162,59619,640227,6549376,64780804, 625573157,5936696909,55620675474,516146265726, 4755391291015,43574880995671,397637888433092, 3617137005125528,32823750870307593, 297304128579802113,2688988551055876630, 24293750984286505810] |