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 | 10 |
| 2 | 37 |
| 3 | 109 |
| 4 | 289 |
| 5 | 721 |
| 6 | 1729 |
| 7 | 4033 |
| 8 | 9217 |
| 9 | 20737 |
| 10 | 46081 |
| 11 | 101377 |
| 12 | 221185 |
| 13 | 479233 |
| 14 | 1032193 |
| 15 | 2211841 |
| 16 | 4718593 |
| 17 | 10027009 |
| 18 | 21233665 |
| 19 | 44826625 |
| 20 | 94371841 |
| 21 | 198180865 |
| 22 | 415236097 |
| 23 | 868220929 |
| 24 | 1811939329 |
| 25 | 3774873601 |
| 26 | 7851737089 |
| 27 | 16307453953 |
| 28 | 33822867457 |
| 29 | 70061654017 |