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 | 13 |
| 2 | 169 |
| 3 | 234 |
| 4 | 650 |
| 5 | 1794 |
| 6 | 4992 |
| 7 | 13806 |
| 8 | 38376 |
| 9 | 106236 |
| 10 | 295074 |
| 11 | 817362 |
| 12 | 2269098 |
| 13 | 6288048 |
| 14 | 17450550 |
| 15 | 48371544 |
| 16 | 134210700 |
| 17 | 372088314 |
| 18 | 1032237882 |
| 19 | 2862135666 |
| 20 | 7939298016 |
| 21 | 22015398366 |
| 22 | 61064779464 |
| 23 | 169339275612 |
| 24 | 469681757298 |