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 | 1 |
| 2 | 821 |
| 3 | 7812 |
| 4 | 48361 |
| 5 | 52187 |
| 6 | 639972 |
| 7 | 345328 |
| 8 | 2517902 |
| 9 | 9692874 |
| 10 | 1 |
| 11 | 17178491 |
| 12 | 80813853 |
| 13 | 71584726 |
| 14 | 405314501 |
| 15 | 573958071 |
| 16 | 654534862 |
| 17 | 376833014 |
| 18 | 230022216 |
| 19 | 937178398 |
| 20 | 821 |
| 21 | 1458801081 |
| 22 | 8887534942 |
| 23 | 7445284043 |
| 24 | 4241746854 |
| 25 | 5265153016 |
| 26 | 6710181308 |
| 27 | 30235306401 |