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 | 22 |
| 2 | 178 |
| 3 | 1162 |
| 4 | 8858 |
| 5 | 68622 |
| 6 | 544618 |
| 7 | 4381798 |
| 8 | 35637914 |
| 9 | 292226842 |
| 10 | 2411821538 |
| 11 | 20009585090 |
| 12 | 166720115762 |
| 13 | 1394041188406 |
| 14 | 11690891947304 |
| 15 | 98287713954492 |
| 16 | 828060495187498 |
| 17 | 6988697529064642 |
| 18 | 59072380033613392 |
| 19 | 499951394598901592 |