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 | 12 |
| 3 | 115 |
| 4 | 1032 |
| 5 | 9049 |
| 6 | 78660 |
| 7 | 681499 |
| 8 | 5896848 |
| 9 | 50998705 |
| 10 | 440975868 |
| 11 | 3812747971 |
| 12 | 32964675480 |
| 13 | 285006414601 |
| 14 | 2464101386292 |
| 15 | 21304030612075 |
| 16 | 184189427142432 |
| 17 | 1592456237959009 |
| 18 | 13767981468377580 |
| 19 | 119034546719719699 |