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 | 19 |
| 2 | 47 |
| 3 | 1321 |
| 4 | 989 |
| 5 | 21779 |
| 6 | 141481 |
| 7 | 1132277 |
| 8 | 801821 |
| 9 | 91424611 |
| 10 | 45706007 |
| 11 | 4205393539 |
| 12 | 5256312899 |
| 13 | 31539920369 |
| 14 | 457304942543 |
| 15 | 226832956041173 |
| 16 | 14176557010703 |
| 17 | 28353956712541 |
| 18 | 524535004412921 |
| 19 | 2098185082863029 |