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 | 42 |
| 2 | 1638 |
| 3 | 10659 |
| 4 | 40480 |
| 5 | 115101 |
| 6 | 272272 |
| 7 | 566618 |
| 8 | 1072764 |
| 9 | 1888460 |
| 10 | 3137706 |
| 11 | 4973877 |
| 12 | 7582848 |
| 13 | 11186119 |
| 14 | 16043940 |
| 15 | 22458436 |
| 16 | 30776732 |
| 17 | 41394078 |
| 18 | 54756974 |
| 19 | 71366295 |
| 20 | 91780416 |
| 21 | 116618337 |
| 22 | 146562808 |
| 23 | 182363454 |
| 24 | 224839900 |
| 25 | 274884896 |
| 26 | 333467442 |
| 27 | 401635913 |