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 | 92 |
| 5 | 262 |
| 6 | 2978 |
| 7 | 258238 |
| 8 | 805262 |
| 9 | 9191762 |
| 10 | 81784378 |
| 11 | 696037692 |
| 12 | 2546858238 |
| 13 | 93095030408 |
| 14 | 2620848420738 |
| 15 | 26204321529981784378 |