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 | 16 |
| 2 | 1 |
| 3 | 16 |
| 4 | 4 |
| 5 | 64 |
| 6 | 25 |
| 7 | 368 |
| 8 | 201 |
| 9 | 2545 |
| 10 | 1855 |
| 11 | 21082 |
| 12 | 17922 |
| 13 | 193932 |
| 14 | 178310 |
| 15 | 1883444 |
| 16 | 1798105 |
| 17 | 18748029 |
| 18 | 18258149 |
| 19 | 188640260 |
| 20 | 186011969 |
| 21 | 1906833092 |
| 22 | 1898120576 |
| 23 | 19312818727 |
| 24 | 19383847701 |
| 25 | 195770541009 |
| 26 | 198022534325 |
| 27 | 1985235845500 |