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 | 12 |
| 2 | 219 |
| 3 | 4778 |
| 4 | 115011 |
| 5 | 2945982 |
| 6 | 78764484 |
| 7 | 2172877458 |
| 8 | 61393035171 |
| 9 | 1767592420152 |
| 10 | 51672186100899 |
| 11 | 1529632003964688 |
| 12 | 45760966837725556 |
| 13 | 1381338453812353272 |
| 14 | 42020564167060633464 |
| 15 | 1286902432396816483218 |
| 16 | 39645674268979326240291 |
| 17 | 1227773019572168363776092 |