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 | 4 |
| 1 | 26 |
| 2 | 314 |
| 3 | 3595 |
| 4 | 40882 |
| 5 | 459577 |
| 6 | 5109839 |
| 7 | 56168169 |
| 8 | 611720495 |
| 9 | 6609454805 |
| 10 | 70937808071 |
| 11 | 757060825018 |
| 12 | 8040423200947 |
| 13 | 85037651263063 |
| 14 | 896113850117314 |
| 15 | 9413000361625346 |
| 16 | 98597629032410971 |
| 17 | 1030179406403917981 |
| 18 | 10739422018595513973 |
| 19 | 111729397883168684917 |
| 20 | 1160260967837159869621 |