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 | 2 |
| 2 | 8 |
| 3 | 22 |
| 4 | 78 |
| 5 | 254 |
| 6 | 952 |
| 7 | 3434 |
| 8 | 12948 |
| 9 | 48642 |
| 10 | 185016 |
| 11 | 705434 |
| 12 | 2705178 |
| 13 | 10400602 |
| 14 | 40120040 |
| 15 | 155117794 |
| 16 | 601093338 |
| 17 | 2333606222 |
| 18 | 9075184872 |
| 19 | 35345263802 |
| 20 | 137846713906 |
| 21 | 538257877894 |
| 22 | 2104099669160 |
| 23 | 8233430727602 |
| 24 | 32247606401148 |