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 | 1 |
| 2 | 10 |
| 3 | 216 |
| 4 | 8181 |
| 5 | 489753 |
| 6 | 43073059 |
| 7 | 5251140144 |
| 8 | 847811871333 |
| 9 | 175006259417547 |
| 10 | 44939475107574752 |
| 11 | 14046429669829943012 |
| 12 | 5249989348656458769520 |
| 13 | 2312011774544840687484876 |
| 14 | 1184766852578716585055014620 |
| 15 | 698927709348312453031204116720 |