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 | 2 |
| 1 | 5 |
| 2 | 8 |
| 3 | 20 |
| 4 | 44 |
| 5 | 71 |
| 6 | 107 |
| 7 | 161 |
| 8 | 242 |
| 9 | 545 |
| 10 | 818 |
| 11 | 1841 |
| 12 | 2762 |
| 13 | 6215 |
| 14 | 9323 |
| 15 | 13985 |
| 16 | 20978 |
| 17 | 47201 |
| 18 | 70802 |
| 19 | 159305 |
| 20 | 238958 |
| 21 | 358910 |
| 22 | 807548 |
| 23 | 1814615 |
| 24 | 2721923 |
| 25 | 4082885 |
| 26 | 6124328 |
| 27 | 13779557 |
| 28 | 20669336 |
| 29 | 40222412 |
| 30 | 87267041 |