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 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 15 |
| 6 | 28 |
| 7 | 47 |
| 8 | 98 |
| 9 | 199 |
| 10 | 373 |
| 11 | 661 |
| 12 | 1404 |
| 13 | 2801 |
| 14 | 5283 |
| 15 | 9859 |
| 16 | 20495 |
| 17 | 40615 |
| 18 | 77040 |
| 19 | 147760 |
| 20 | 303553 |
| 21 | 599801 |
| 22 | 1143134 |
| 23 | 2228414 |
| 24 | 4544731 |
| 25 | 8968421 |
| 26 | 17160232 |
| 27 | 33801192 |
| 28 | 68602923 |
| 29 | 135308317 |
| 30 | 259763268 |
| 31 | 515250948 |
| 32 | 1042217402 |
| 33 | 2055373383 |