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 | 2 |
| 2 | 7 |
| 3 | 15 |
| 4 | 67 |
| 5 | 92 |
| 6 | 461 |
| 7 | 1065 |
| 8 | 3016 |
| 9 | 3956 |
| 10 | 29478 |
| 11 | 42231 |
| 12 | 379107 |
| 13 | 547556 |
| 14 | 603421 |
| 15 | 991923 |
| 16 | 12709228 |
| 17 | 18540622 |
| 18 | 241033695 |
| 19 | 352271227 |
| 20 | 389226278 |
| 21 | 407797820 |
| 22 | 5532937710 |
| 23 | 8097345425 |
| 24 | 30368363481 |
| 25 | 41503874738 |
| 26 | 98701094676 |
| 27 | 127342427241 |