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 | 4 |
| 2 | 11 |
| 3 | 20 |
| 4 | 46 |
| 5 | 97 |
| 6 | 216 |
| 7 | 472 |
| 8 | 1043 |
| 9 | 2296 |
| 10 | 5066 |
| 11 | 11169 |
| 12 | 24636 |
| 13 | 54332 |
| 14 | 119835 |
| 15 | 264300 |
| 16 | 582934 |
| 17 | 1285697 |
| 18 | 2835696 |
| 19 | 6254320 |
| 20 | 13794339 |
| 21 | 30424368 |
| 22 | 67103058 |
| 23 | 148000449 |
| 24 | 326425268 |
| 25 | 719953588 |
| 26 | 1587907627 |
| 27 | 3502240516 |
| 28 | 7724434622 |
| 29 | 17036776865 |