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 | 3 |
| 2 | 11 |
| 3 | 14 |
| 4 | 35 |
| 5 | 71 |
| 6 | 186 |
| 7 | 459 |
| 8 | 1287 |
| 9 | 3490 |
| 10 | 9699 |
| 11 | 27707 |
| 12 | 79358 |
| 13 | 229491 |
| 14 | 669203 |
| 15 | 1958414 |
| 16 | 5753843 |
| 17 | 16951391 |
| 18 | 50026322 |
| 19 | 147861435 |
| 20 | 437469791 |
| 21 | 1295219194 |
| 22 | 3836957139 |
| 23 | 11370949011 |
| 24 | 33707274678 |
| 25 | 99940712835 |
| 26 | 296363420843 |
| 27 | 878924723910 |