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 | 2 |
| 3 | 4 |
| 4 | 10 |
| 5 | 23 |
| 6 | 56 |
| 7 | 132 |
| 8 | 316 |
| 9 | 752 |
| 10 | 1793 |
| 11 | 4272 |
| 12 | 10183 |
| 13 | 24266 |
| 14 | 57833 |
| 15 | 137828 |
| 16 | 328475 |
| 17 | 782827 |
| 18 | 1865651 |
| 19 | 4446255 |
| 20 | 10596406 |
| 21 | 25253567 |
| 22 | 60184809 |
| 23 | 143433647 |
| 24 | 341833954 |
| 25 | 814665553 |
| 26 | 1941527332 |
| 27 | 4627086990 |
| 28 | 11027366781 |
| 29 | 26280642313 |
| 30 | 62632555360 |
| 31 | 149267165702 |