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 | 5 |
| 3 | 17 |
| 4 | 821 |
| 5 | 2851 |
| 6 | 8291 |
| 7 | 12583 |
| 8 | 32213 |
| 9 | 64567 |
| 10 | 193283 |
| 11 | 481409 |
| 12 | 507979 |
| 13 | 2889443 |
| 14 | 3026911 |
| 15 | 15233891 |
| 16 | 24430993 |
| 17 | 95635361 |
| 18 | 95754697 |
| 19 | 221519339 |
| 20 | 1147397567 |
| 21 | 12921783863 |
| 22 | 28711457651 |
| 23 | 63521027291 |
| 24 | 305580335353 |
| 25 | 1449155675287 |
| 26 | 3157505489581 |
| 27 | 6839699592347 |
| 28 | 14717764856273 |
| 29 | 67875393766057 |