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 | 7 |
| 2 | 27 |
| 3 | 100 |
| 4 | 371 |
| 5 | 1386 |
| 6 | 5214 |
| 7 | 19734 |
| 8 | 75075 |
| 9 | 286858 |
| 10 | 1100138 |
| 11 | 4232592 |
| 12 | 16328942 |
| 13 | 63146500 |
| 14 | 244711260 |
| 15 | 950094810 |
| 16 | 3694876515 |
| 17 | 14390571690 |
| 18 | 56122547250 |
| 19 | 219140635560 |
| 20 | 856617714810 |
| 21 | 3351878581740 |
| 22 | 13127747882340 |
| 23 | 51458942047500 |
| 24 | 201869999056206 |
| 25 | 792497263436676 |