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) |
|---|---|
| 0 | 2 |
| 1 | 41 |
| 2 | 2427 |
| 3 | 132059 |
| 4 | 6426919 |
| 5 | 291627051 |
| 6 | 12646104721 |
| 7 | 531741567755 |
| 8 | 21868328382007 |
| 9 | 884528298065271 |
| 10 | 35319715358896709 |
| 11 | 1395934334687210019 |
| 12 | 54710988941767714851 |
| 13 | 2129404515458094306737 |
| 14 | 82391816104703313499231 |
| 15 | 3171892875586735205701385 |
| 16 | 121577571158289668158700601 |