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 | 4 |
| 4 | 6 |
| 5 | 14 |
| 6 | 29 |
| 7 | 65 |
| 8 | 137 |
| 9 | 277 |
| 10 | 546 |
| 11 | 1109 |
| 12 | 2208 |
| 13 | 4391 |
| 14 | 8746 |
| 15 | 17404 |
| 16 | 34662 |
| 17 | 69036 |
| 18 | 137604 |
| 19 | 274385 |
| 20 | 547278 |
| 21 | 1091962 |
| 22 | 2179171 |
| 23 | 4349905 |
| 24 | 8684545 |
| 25 | 17341369 |
| 26 | 34632301 |
| 27 | 69172557 |
| 28 | 138175535 |
| 29 | 276039015 |
| 30 | 551501773 |