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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 20 |
| 7 | 35 |
| 8 | 70 |
| 9 | 126 |
| 10 | 252 |
| 11 | 461 |
| 12 | 922 |
| 13 | 1702 |
| 14 | 3404 |
| 15 | 6315 |
| 16 | 12630 |
| 17 | 23494 |
| 18 | 46988 |
| 19 | 87533 |
| 20 | 175066 |
| 21 | 326382 |
| 22 | 652764 |
| 23 | 1217483 |
| 24 | 2434966 |
| 25 | 4542526 |
| 26 | 9085052 |
| 27 | 16950573 |
| 28 | 33901146 |
| 29 | 63255670 |
| 30 | 126511340 |
| 31 | 236063915 |
| 32 | 472127830 |
| 33 | 880983606 |
| 34 | 1761967212 |
| 35 | 3287837741 |