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 | 444 |
| 3 | 2187 |
| 4 | 7443 |
| 5 | 20247 |
| 6 | 47313 |
| 7 | 98994 |
| 8 | 190386 |
| 9 | 342576 |
| 10 | 584034 |
| 11 | 952149 |
| 12 | 1494909 |
| 13 | 2272725 |
| 14 | 3360399 |
| 15 | 4849236 |
| 16 | 6849300 |
| 17 | 9491814 |
| 18 | 12931704 |
| 19 | 17350287 |
| 20 | 22958103 |
| 21 | 29997891 |
| 22 | 38747709 |
| 23 | 49524198 |
| 24 | 62685990 |
| 25 | 78637260 |
| 26 | 97831422 |
| 27 | 120774969 |
| 28 | 148031457 |
| 29 | 180225633 |
| 30 | 218047707 |