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 | 0 |
| 1 | 1 |
| 2 | 16 |
| 3 | 17 |
| 4 | 84 |
| 5 | 185 |
| 6 | 1379 |
| 7 | 1564 |
| 8 | 2943 |
| 9 | 7450 |
| 10 | 17843 |
| 11 | 132351 |
| 12 | 547247 |
| 13 | 679598 |
| 14 | 1906443 |
| 15 | 2586041 |
| 16 | 157068903 |
| 17 | 159654944 |
| 18 | 636033735 |
| 19 | 795688679 |
| 20 | 2227411093 |
| 21 | 18614977423 |
| 22 | 95302298208 |
| 23 | 113917275631 |
| 24 | 323136849470 |
| 25 | 437054125101 |
| 26 | 760190974571 |
| 27 | 1197245099672 |