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 | 1 |
| 2 | 31 |
| 3 | 345 |
| 4 | 4938 |
| 5 | 85215 |
| 6 | 1245294 |
| 7 | 18444470 |
| 8 | 278238087 |
| 9 | 4170628296 |
| 10 | 62588525694 |
| 11 | 940255638767 |
| 12 | 14117945596996 |
| 13 | 211965773459470 |
| 14 | 3182555837979301 |
| 15 | 47783850148231569 |
| 16 | 717445698125438780 |
| 17 | 10772054909227440585 |