This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 81 |
| 3 | 810 |
| 4 | 7371 |
| 5 | 66420 |
| 6 | 597861 |
| 7 | 5380830 |
| 8 | 48427551 |
| 9 | 435848040 |
| 10 | 3922632441 |
| 11 | 35303692050 |
| 12 | 317733228531 |
| 13 | 2859599056860 |
| 14 | 25736391511821 |
| 15 | 231627523606470 |
| 16 | 2084647712458311 |
| 17 | 18761829412124880 |
| 18 | 168856464709124001 |
| 19 | 1519708182382116090 |
| 20 | 13677373641439044891 |