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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 11 |
| 5 | 21 |
| 6 | 41 |
| 7 | 80 |
| 8 | 155 |
| 9 | 303 |
| 10 | 593 |
| 11 | 1162 |
| 12 | 2280 |
| 13 | 4478 |
| 14 | 8806 |
| 15 | 17336 |
| 16 | 34158 |
| 17 | 67361 |
| 18 | 132938 |
| 19 | 262532 |
| 20 | 518776 |
| 21 | 1025694 |
| 22 | 2028969 |
| 23 | 4015445 |
| 24 | 7950176 |
| 25 | 15746722 |
| 26 | 31200476 |
| 27 | 61841291 |
| 28 | 122611717 |
| 29 | 243171319 |
| 30 | 482404577 |
| 31 | 957241908 |
| 32 | 1899924792 |
| 33 | 3771806031 |
| 34 | 7489535293 |
| 35 | 14874685547 |