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 | 24 |
| 3 | 452 |
| 4 | 6263 |
| 5 | 75662 |
| 6 | 820207 |
| 7 | 8491909 |
| 8 | 86727773 |
| 9 | 879578102 |
| 10 | 8878382430 |
| 11 | 89326016765 |
| 12 | 896499124003 |
| 13 | 8981948713433 |
| 14 | 89902031287356 |
| 15 | 899441785434096 |
| 16 | 8996797304009863 |
| 17 | 89981980972837834 |
| 18 | 899900967867894143 |
| 19 | 8999467457237611688 |
| 20 | 89997196286115385871 |