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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 17 |
| 7 | 36 |
| 8 | 79 |
| 9 | 179 |
| 10 | 407 |
| 11 | 935 |
| 12 | 2173 |
| 13 | 5089 |
| 14 | 12005 |
| 15 | 28500 |
| 16 | 68022 |
| 17 | 163154 |
| 18 | 393060 |
| 19 | 950652 |
| 20 | 2307454 |
| 21 | 5618906 |
| 22 | 13723145 |
| 23 | 33607242 |
| 24 | 82507764 |
| 25 | 203028034 |
| 26 | 500659653 |
| 27 | 1237053269 |
| 28 | 3062204227 |
| 29 | 7593229687 |
| 30 | 18858944533 |
| 31 | 46909741893 |
| 32 | 116848688876 |
| 33 | 291449697298 |