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 | 19 |
| 2 | 323 |
| 3 | 4845 |
| 4 | 63441 |
| 5 | 731595 |
| 6 | 7979715 |
| 7 | 96556005 |
| 8 | 1388717505 |
| 9 | 20396897955 |
| 10 | 278955792675 |
| 11 | 4129174820925 |
| 12 | 75420709974225 |
| 13 | 1390870436830875 |
| 14 | 23182616315333475 |
| 15 | 431959271726107125 |