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 | 1 |
| 1 | 8 |
| 2 | 58 |
| 3 | 426 |
| 4 | 3124 |
| 5 | 22914 |
| 6 | 168066 |
| 7 | 1232708 |
| 8 | 9041498 |
| 9 | 66316346 |
| 10 | 486408084 |
| 11 | 3567639634 |
| 12 | 26167436306 |
| 13 | 191929340708 |
| 14 | 1407737135338 |
| 15 | 10325278224266 |
| 16 | 75732441613044 |
| 17 | 555471977422754 |
| 18 | 4074200053901346 |
| 19 | 29882886543125508 |