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) |
|---|---|
| 2 | 1 |
| 3 | 34 |
| 4 | 464 |
| 5 | 3182 |
| 6 | 14769 |
| 7 | 53044 |
| 8 | 158976 |
| 9 | 416140 |
| 10 | 980625 |
| 11 | 2124310 |
| 12 | 4295376 |
| 13 | 8199674 |
| 14 | 14907809 |
| 15 | 25992232 |
| 16 | 43700224 |
| 17 | 71167704 |
| 18 | 112680801 |
| 19 | 173990730 |
| 20 | 262690000 |
| 21 | 388656070 |
| 22 | 564571601 |
| 23 | 806527964 |
| 24 | 1134722304 |
| 25 | 1574255332 |
| 26 | 2156041329 |
| 27 | 2917838014 |
| 28 | 3905408976 |
| 29 | 5173826770 |
| 30 | 6788930625 |