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) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 13 |
| 4 | 62 |
| 5 | 75 |
| 6 | 287 |
| 7 | 936 |
| 8 | 15263 |
| 9 | 46725 |
| 10 | 155438 |
| 11 | 202163 |
| 12 | 964090 |
| 13 | 1166253 |
| 14 | 4462849 |
| 15 | 14554800 |
| 16 | 237339649 |
| 17 | 726573747 |
| 18 | 2417060890 |
| 19 | 3143634637 |
| 20 | 14991599438 |
| 21 | 18135234075 |
| 22 | 69397301663 |
| 23 | 226327139064 |
| 24 | 3690631526687 |
| 25 | 11298221719125 |
| 26 | 37585296684062 |
| 27 | 48883518403187 |