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 | 4 |
| 3 | 13 |
| 4 | 29 |
| 5 | 81 |
| 6 | 188 |
| 7 | 456 |
| 8 | 1030 |
| 9 | 2405 |
| 10 | 5295 |
| 11 | 11611 |
| 12 | 25246 |
| 13 | 53552 |
| 14 | 113332 |
| 15 | 235685 |
| 16 | 486011 |
| 17 | 990840 |
| 18 | 2006567 |
| 19 | 4018010 |
| 20 | 7992003 |
| 21 | 15768511 |
| 22 | 30875424 |
| 23 | 60060509 |
| 24 | 116042548 |
| 25 | 222817961 |
| 26 | 425200270 |
| 27 | 806991037 |
| 28 | 1522748592 |
| 29 | 2858792520 |
| 30 | 5339457208 |
| 31 | 9924370365 |