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) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 36 |
| 3 | 271 |
| 4 | 5904 |
| 5 | 84375 |
| 6 | 953344 |
| 7 | 9882351 |
| 8 | 99737856 |
| 9 | 999468559 |
| 10 | 9999000000 |
| 11 | 99998228439 |
| 12 | 999997014016 |
| 13 | 9999995173191 |
| 14 | 99999992470464 |
| 15 | 999999988609375 |
| 16 | 9999999983222784 |
| 17 | 99999999975862431 |
| 18 | 999999999965987776 |