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 | 1385 |
| 1 | 50521 |
| 2 | 663061 |
| 3 | 5162421 |
| 4 | 28862471 |
| 5 | 127838711 |
| 6 | 475638163 |
| 7 | 1544454483 |
| 8 | 4494470838 |
| 9 | 11949575638 |
| 10 | 29449955678 |
| 11 | 68035028126 |
| 12 | 148639284066 |
| 13 | 309297261826 |
| 14 | 616573557226 |
| 15 | 1183184394986 |
| 16 | 2194487337735 |
| 17 | 3947417571735 |
| 18 | 6906579371835 |
| 19 | 11783600663835 |
| 20 | 19647572529585 |