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 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 15 |
| 7 | 27 |
| 8 | 48 |
| 9 | 85 |
| 10 | 150 |
| 11 | 264 |
| 12 | 464 |
| 13 | 815 |
| 14 | 1431 |
| 15 | 2512 |
| 16 | 4409 |
| 17 | 7738 |
| 18 | 13580 |
| 19 | 23832 |
| 20 | 41823 |
| 21 | 73395 |
| 22 | 128800 |
| 23 | 226029 |
| 24 | 396654 |
| 25 | 696080 |
| 26 | 1221536 |
| 27 | 2143647 |
| 28 | 3761839 |
| 29 | 6601568 |
| 30 | 11584945 |