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 | 3 |
| 2 | 8 |
| 3 | 57 |
| 4 | 1047 |
| 5 | 27216 |
| 6 | 861642 |
| 7 | 21444846 |
| 8 | 674273372 |
| 9 | 147534349327 |
| 10 | 45941644105613 |
| 11 | 244158265828023 |
| 12 | 569209871196597077 |
| 13 | 15204969799577672558 |
| 14 | 2111244131216208612515 |
| 15 | 129192323492968413250921 |
| 16 | 25814874251189658671192458 |
| 17 | 13543096262710710570994132579 |