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 | 1 |
| 2 | 3 |
| 3 | 36 |
| 4 | 9801 |
| 5 | 40755 |
| 6 | 121771 |
| 7 | 297045 |
| 8 | 631125 |
| 9 | 1212751 |
| 10 | 2158695 |
| 11 | 3617601 |
| 12 | 5773825 |
| 13 | 8851275 |
| 14 | 13117251 |
| 15 | 18886285 |
| 16 | 26523981 |
| 17 | 36450855 |
| 18 | 49146175 |
| 19 | 65151801 |
| 20 | 85076025 |
| 21 | 109597411 |
| 22 | 139468635 |
| 23 | 175520325 |
| 24 | 218664901 |
| 25 | 269900415 |
| 26 | 330314391 |
| 27 | 401087665 |
| 28 | 483498225 |
| 29 | 578925051 |
| 30 | 688851955 |
| 31 | 814871421 |