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 | 2 |
| 2 | 108 |
| 3 | 3242 |
| 4 | 68190 |
| 5 | 1107920 |
| 6 | 14692734 |
| 7 | 164826956 |
| 8 | 1604095524 |
| 9 | 13799638910 |
| 10 | 106481351240 |
| 11 | 745616925614 |
| 12 | 4783532975546 |
| 13 | 28342922553764 |
| 14 | 156153427053890 |
| 15 | 804648531335960 |
| 16 | 3897769097766104 |
| 17 | 17828728267167326 |
| 18 | 77310179609631564 |
| 19 | 318931533062574470 |