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 | 7 |
| 4 | 14 |
| 5 | 30 |
| 6 | 76 |
| 7 | 188 |
| 8 | 444 |
| 9 | 1071 |
| 10 | 2638 |
| 11 | 6460 |
| 12 | 15756 |
| 13 | 38783 |
| 14 | 95778 |
| 15 | 236270 |
| 16 | 584394 |
| 17 | 1448972 |
| 18 | 3596146 |
| 19 | 8935547 |
| 20 | 22233108 |
| 21 | 55380945 |
| 22 | 138076092 |
| 23 | 344565415 |
| 24 | 860595928 |
| 25 | 2151093021 |
| 26 | 5380523278 |
| 27 | 13467284628 |
| 28 | 33729132584 |
| 29 | 84523860027 |
| 30 | 211927633632 |