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 | 6 |
| 4 | 21 |
| 5 | 61 |
| 6 | 146 |
| 7 | 302 |
| 8 | 561 |
| 9 | 961 |
| 10 | 1546 |
| 11 | 2366 |
| 12 | 3477 |
| 13 | 4941 |
| 14 | 6826 |
| 15 | 9206 |
| 16 | 12161 |
| 17 | 15777 |
| 18 | 20146 |
| 19 | 25366 |
| 20 | 31541 |
| 21 | 38781 |
| 22 | 47202 |
| 23 | 56926 |
| 24 | 68081 |
| 25 | 80801 |
| 26 | 95226 |
| 27 | 111502 |
| 28 | 129781 |
| 29 | 150221 |
| 30 | 172986 |
| 31 | 198246 |
| 32 | 226177 |
| 33 | 256961 |
| 34 | 290786 |
| 35 | 327846 |
| 36 | 368341 |
| 37 | 412477 |
| 38 | 460466 |
| 39 | 512526 |
| 40 | 568881 |