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 | 7 |
| 2 | 1831 |
| 3 | 9551 |
| 4 | 89689 |
| 5 | 396733 |
| 6 | 11981443 |
| 7 | 70396393 |
| 8 | 1872851947 |
| 9 | 10958687879 |
| 10 | 47203303159 |
| 11 | 767644374817 |
| 12 | 8817792098461 |
| 13 | 78610833115261 |
| 14 | 497687231721157 |
| 15 | 2069461000669981 |
| 16 | 22790428875364879 |
| 17 | 78944802602538877 |
| 18 | 1799235198379903447 |
| 19 | 30789586795090405813 |