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 | 22 |
| 2 | 484 |
| 3 | 2974 |
| 4 | 15921 |
| 5 | 84013 |
| 6 | 454223 |
| 7 | 2439422 |
| 8 | 13111617 |
| 9 | 70473286 |
| 10 | 378687252 |
| 11 | 2035364277 |
| 12 | 10939217853 |
| 13 | 58791177745 |
| 14 | 315968826316 |
| 15 | 1698161503133 |
| 16 | 9126682840332 |
| 17 | 49050798668124 |
| 18 | 263620616510219 |
| 19 | 1416814297314727 |