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 | 10 |
| 2 | 100 |
| 3 | 124 |
| 4 | 375 |
| 5 | 1000 |
| 6 | 10000 |
| 7 | 100000 |
| 8 | 1000000 |
| 9 | 3924474 |
| 10 | 10000000 |
| 11 | 100000000 |
| 12 | 387492084 |
| 13 | 1000000000 |
| 14 | 3885885999 |
| 15 | 10000000000 |
| 16 | 31804089540 |
| 17 | 39371996915 |
| 18 | 100000000000 |
| 19 | 122929061474 |
| 20 | 1000000000000 |
| 21 | 10000000000000 |