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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 29 |
| 6 | 59 |
| 7 | 127 |
| 8 | 241 |
| 9 | 487 |
| 10 | 971 |
| 11 | 1949 |
| 12 | 3889 |
| 13 | 7789 |
| 14 | 15569 |
| 15 | 31139 |
| 16 | 62297 |
| 17 | 124577 |
| 18 | 249181 |
| 19 | 498331 |
| 20 | 996689 |
| 21 | 1993357 |
| 22 | 3986711 |
| 23 | 7973419 |
| 24 | 15946841 |
| 25 | 31893713 |
| 26 | 63787391 |
| 27 | 127574789 |
| 28 | 255149591 |
| 29 | 510299171 |
| 30 | 1020598339 |
| 31 | 2041196683 |
| 32 | 4082393387 |
| 33 | 8164786771 |
| 34 | 16329573527 |