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 | 3 |
| 3 | 6 |
| 4 | 15 |
| 5 | 27 |
| 6 | 63 |
| 7 | 117 |
| 8 | 252 |
| 9 | 492 |
| 10 | 1008 |
| 11 | 1986 |
| 12 | 4059 |
| 13 | 8031 |
| 14 | 16182 |
| 15 | 32277 |
| 16 | 64791 |
| 17 | 129312 |
| 18 | 259188 |
| 19 | 517812 |
| 20 | 1036677 |
| 21 | 2072424 |
| 22 | 4146714 |
| 23 | 8291439 |
| 24 | 16587276 |
| 25 | 33170181 |
| 26 | 66348369 |
| 27 | 132689202 |
| 28 | 265394223 |
| 29 | 530772129 |
| 30 | 1061577642 |
| 31 | 2123121900 |
| 32 | 4246308861 |
| 33 | 8492554653 |