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 | 257 |
| 2 | 2070241 |
| 3 | 17995718017 |
| 4 | 188386299457 |
| 5 | 2505920246017 |
| 6 | 3192202523137 |
| 7 | 5072985298081 |
| 8 | 11905609260481 |
| 9 | 21370852274017 |
| 10 | 766108283826337 |
| 11 | 970961614082017 |
| 12 | 2348771079002657 |
| 13 | 2887223180589697 |
| 14 | 9007197376151521 |
| 15 | 55110306149736577 |
| 16 | 77802445498340417 |