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 | 224 |
| 4 | 714 |
| 5 | 1000 |
| 6 | 10000 |
| 7 | 32410 |
| 8 | 67089 |
| 9 | 100000 |
| 10 | 210010 |
| 11 | 1000000 |
| 12 | 1019825 |
| 13 | 2100010 |
| 14 | 2109599 |
| 15 | 3231100 |
| 16 | 10000000 |
| 17 | 21000010 |
| 18 | 33173785 |
| 19 | 71450010 |
| 20 | 100000000 |
| 21 | 200101000 |
| 22 | 201000100 |
| 23 | 210000010 |
| 24 | 663702049 |
| 25 | 1000000000 |