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 | 16 |
| 2 | 21 |
| 3 | 62 |
| 4 | 185 |
| 5 | 523 |
| 6 | 2106 |
| 7 | 7425 |
| 8 | 23976 |
| 9 | 77199 |
| 10 | 278516 |
| 11 | 970352 |
| 12 | 3224100 |
| 13 | 10748487 |
| 14 | 37400625 |
| 15 | 128931566 |
| 16 | 434968863 |
| 17 | 1468892487 |
| 18 | 5046611020 |
| 19 | 17300239256 |
| 20 | 58747284770 |
| 21 | 199467828264 |
| 22 | 682129604278 |
| 23 | 2332060352220 |
| 24 | 7940005050689 |