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 | 823543 |
| 2 | 105413504 |
| 3 | 1801088541 |
| 4 | 13492928512 |
| 5 | 64339296875 |
| 6 | 230539333248 |
| 7 | 678223072849 |
| 8 | 1727094849536 |
| 9 | 3938980639167 |
| 10 | 8235430000000 |
| 11 | 16048523266853 |
| 12 | 29509034655744 |
| 13 | 51676101935731 |