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 | 10 |
| 2 | 21 |
| 3 | 52 |
| 4 | 125 |
| 5 | 302 |
| 6 | 729 |
| 7 | 1760 |
| 8 | 4249 |
| 9 | 10258 |
| 10 | 24765 |
| 11 | 59788 |
| 12 | 144341 |
| 13 | 348470 |
| 14 | 841281 |
| 15 | 2031032 |
| 16 | 4903345 |
| 17 | 11837722 |
| 18 | 28578789 |
| 19 | 68995300 |
| 20 | 166569389 |
| 21 | 402134078 |
| 22 | 970837545 |
| 23 | 2343809168 |
| 24 | 5658455881 |