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 | 4 |
| 2 | 17 |
| 3 | 55 |
| 4 | 7 |
| 5 | 93 |
| 6 | 754 |
| 7 | 2611 |
| 8 | 31092 |
| 9 | 55207 |
| 10 | 301252 |
| 11 | 955428 |
| 12 | 805428 |
| 13 | 3651249 |
| 14 | 3686621 |
| 15 | 5510710 |
| 16 | 42337888 |
| 17 | 109670084 |
| 18 | 590903433 |
| 19 | 1010572448 |