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 | 0 |
| 1 | 12 |
| 2 | 127 |
| 3 | 742 |
| 4 | 3157 |
| 5 | 10857 |
| 6 | 31899 |
| 7 | 82929 |
| 8 | 195459 |
| 9 | 425139 |
| 10 | 864864 |
| 11 | 1662661 |
| 12 | 3045406 |
| 13 | 5349526 |
| 14 | 9059946 |
| 15 | 14858646 |
| 16 | 23684298 |
| 17 | 36804558 |
| 18 | 55902693 |
| 19 | 83180328 |
| 20 | 121478203 |
| 21 | 174416935 |
| 22 | 246559885 |
| 23 | 343600335 |
| 24 | 472575285 |
| 25 | 642108285 |
| 26 | 862683822 |
| 27 | 1146955887 |
| 28 | 1510093452 |