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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 24 |
| 5 | 55 |
| 6 | 189 |
| 7 | 433 |
| 8 | 1488 |
| 9 | 3409 |
| 10 | 11715 |
| 11 | 26839 |
| 12 | 92232 |
| 13 | 211303 |
| 14 | 726141 |
| 15 | 1663585 |
| 16 | 5716896 |
| 17 | 13097377 |
| 18 | 45009027 |
| 19 | 103115431 |
| 20 | 354355320 |
| 21 | 811826071 |
| 22 | 2789833533 |
| 23 | 6391493137 |
| 24 | 21964312944 |
| 25 | 50320119025 |
| 26 | 172924670019 |
| 27 | 396169459063 |
| 28 | 1361433047208 |
| 29 | 3119035553479 |