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 | 1 |
| 2 | 6 |
| 3 | 16 |
| 4 | 32 |
| 5 | 279 |
| 6 | 726 |
| 7 | 4141 |
| 8 | 4368 |
| 9 | 54482 |
| 10 | 112572 |
| 11 | 366613 |
| 12 | 978019 |
| 13 | 5342223 |
| 14 | 41589964 |
| 15 | 201780051 |
| 16 | 353794663 |
| 17 | 408307432 |
| 18 | 463394050 |
| 19 | 676353989 |
| 20 | 866725306 |
| 21 | 999357112 |
| 22 | 3878963429 |
| 23 | 4169753024 |
| 24 | 8541140255 |
| 25 | 23422387081 |
| 26 | 26113359872 |
| 27 | 940995107440 |
| 28 | 1104573841707 |