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) |
|---|---|
| 1 | 448 |
| 2 | 1732 |
| 3 | 7918 |
| 4 | 39316 |
| 5 | 205628 |
| 6 | 1118398 |
| 7 | 6286658 |
| 8 | 36383284 |
| 9 | 216134044 |
| 10 | 1314160492 |
| 11 | 8155899320 |
| 12 | 51526819510 |
| 13 | 330559583178 |
| 14 | 2148524237842 |
| 15 | 14120142260138 |
| 16 | 93669254201140 |
| 17 | 626289974615094 |
| 18 | 4215364545901036 |
| 19 | 28531464984810918 |
| 20 | 194028126730583796 |