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 | 8 |
| 4 | 23 |
| 5 | 61 |
| 6 | 144 |
| 7 | 322 |
| 8 | 689 |
| 9 | 1439 |
| 10 | 2954 |
| 11 | 6004 |
| 12 | 12123 |
| 13 | 24385 |
| 14 | 48932 |
| 15 | 98054 |
| 16 | 196325 |
| 17 | 392899 |
| 18 | 786078 |
| 19 | 1572472 |
| 20 | 3145295 |
| 21 | 6290981 |
| 22 | 12582392 |
| 23 | 25165258 |
| 24 | 50331033 |
| 25 | 100662631 |
| 26 | 201325874 |
| 27 | 402652412 |
| 28 | 805305539 |
| 29 | 1610611849 |
| 30 | 3221224524 |
| 31 | 6442449934 |