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 | 29 |
| 2 | 267 |
| 3 | 1252 |
| 4 | 4339 |
| 5 | 13283 |
| 6 | 39037 |
| 7 | 114537 |
| 8 | 340134 |
| 9 | 1025559 |
| 10 | 3143071 |
| 11 | 9794989 |
| 12 | 31018972 |
| 13 | 99708260 |
| 14 | 324764638 |
| 15 | 1069736878 |
| 16 | 3556096357 |
| 17 | 11908005965 |
| 18 | 40101772888 |
| 19 | 135631552056 |
| 20 | 460218357877 |
| 21 | 1565350043268 |
| 22 | 5333698073679 |