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 | 2 |
| 2 | 6 |
| 3 | 14 |
| 4 | 35 |
| 5 | 85 |
| 6 | 208 |
| 7 | 508 |
| 8 | 1241 |
| 9 | 3032 |
| 10 | 7407 |
| 11 | 18096 |
| 12 | 44209 |
| 13 | 108005 |
| 14 | 263861 |
| 15 | 644625 |
| 16 | 1574849 |
| 17 | 3847430 |
| 18 | 9399452 |
| 19 | 22963302 |
| 20 | 56100424 |
| 21 | 137055967 |
| 22 | 334834156 |
| 23 | 818015548 |
| 24 | 1998450352 |
| 25 | 4882307945 |
| 26 | 11927707309 |
| 27 | 29139948412 |
| 28 | 71190260748 |