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 | 12 |
| 2 | 454 |
| 3 | 11988 |
| 4 | 311144 |
| 5 | 8222576 |
| 6 | 217145076 |
| 7 | 5730640104 |
| 8 | 151245101550 |
| 9 | 3991784606164 |
| 10 | 105354316048660 |
| 11 | 2780593210008194 |
| 12 | 73387575404296206 |
| 13 | 1936901875857360748 |
| 14 | 51120219046394982056 |
| 15 | 1349204535780755578282 |