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 | 5 |
| 2 | 41 |
| 3 | 233 |
| 4 | 1217 |
| 5 | 6185 |
| 6 | 31121 |
| 7 | 155993 |
| 8 | 780737 |
| 9 | 3905225 |
| 10 | 19529201 |
| 11 | 97652153 |
| 12 | 488273057 |
| 13 | 2441389865 |
| 14 | 12206998481 |
| 15 | 61035090713 |
| 16 | 305175650177 |
| 17 | 1525878644105 |
| 18 | 7629394006961 |
| 19 | 38146971607673 |
| 20 | 190734861184097 |
| 21 | 953674312211945 |
| 22 | 4768371573642641 |