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 | 5 |
| 2 | 5 |
| 3 | 10 |
| 4 | 21 |
| 5 | 50 |
| 6 | 116 |
| 7 | 259 |
| 8 | 601 |
| 9 | 1397 |
| 10 | 3196 |
| 11 | 7359 |
| 12 | 17016 |
| 13 | 39172 |
| 14 | 90185 |
| 15 | 208017 |
| 16 | 479413 |
| 17 | 1104402 |
| 18 | 2545521 |
| 19 | 5866934 |
| 20 | 13519272 |
| 21 | 31155923 |
| 22 | 71803941 |
| 23 | 165473389 |
| 24 | 381338852 |
| 25 | 878829251 |
| 26 | 2025313404 |
| 27 | 4667430712 |
| 28 | 10756397233 |
| 29 | 24788787493 |
| 30 | 57127147381 |