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 | 5 |
| 3 | 16 |
| 4 | 49 |
| 5 | 129 |
| 6 | 341 |
| 7 | 833 |
| 8 | 2029 |
| 9 | 4760 |
| 10 | 11068 |
| 11 | 25182 |
| 12 | 56888 |
| 13 | 126661 |
| 14 | 280169 |
| 15 | 613893 |
| 16 | 1337386 |
| 17 | 2893793 |
| 18 | 6232013 |
| 19 | 13352607 |
| 20 | 28497552 |
| 21 | 60580905 |
| 22 | 128368080 |
| 23 | 271153740 |
| 24 | 571224871 |
| 25 | 1200298631 |
| 26 | 2516483260 |
| 27 | 5264785310 |
| 28 | 10993631034 |
| 29 | 22915508186 |
| 30 | 47688470005 |