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 | 3 |
| 2 | 8 |
| 3 | 25 |
| 4 | 111 |
| 5 | 809 |
| 6 | 10360 |
| 7 | 236952 |
| 8 | 9708797 |
| 9 | 714862984 |
| 10 | 95000655195 |
| 11 | 22902964060238 |
| 12 | 10070812803900694 |
| 13 | 8120691251242651341 |
| 14 | 12070960239863869828931 |
| 15 | 33238610095183531376362138 |