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 | 5 |
| 3 | 10 |
| 4 | 82 |
| 5 | 284 |
| 6 | 680 |
| 7 | 1322 |
| 8 | 68104 |
| 9 | 149795 |
| 10 | 213895 |
| 11 | 1023127 |
| 12 | 3775307 |
| 13 | 25396927 |
| 14 | 36254395 |
| 15 | 53343289 |
| 16 | 68677522 |
| 17 | 266888359 |
| 18 | 366901277 |
| 19 | 558829814 |
| 20 | 1576699732 |
| 21 | 8527370677 |
| 22 | 11616255230 |
| 23 | 16948492520 |
| 24 | 167299409017 |
| 25 | 222801579737 |
| 26 | 2001199132825 |
| 27 | 5024272986979 |
| 28 | 7880897129684 |