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 | 7 |
| 2 | 68 |
| 3 | 314 |
| 4 | 2281 |
| 5 | 14201 |
| 6 | 88808 |
| 7 | 573119 |
| 8 | 3613793 |
| 9 | 22999331 |
| 10 | 146183595 |
| 11 | 928047561 |
| 12 | 5898371728 |
| 13 | 37468267405 |
| 14 | 238038322708 |
| 15 | 1512327060362 |
| 16 | 9607753234896 |
| 17 | 61039432234655 |
| 18 | 387788945511548 |
| 19 | 2463656446529920 |
| 20 | 15651856594703719 |