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 | 1 |
| 2 | 3 |
| 3 | 4 |
| 4 | 17 |
| 5 | 6 |
| 6 | 307 |
| 7 | 8 |
| 8 | 5049 |
| 9 | 30250 |
| 10 | 105851 |
| 11 | 12 |
| 12 | 25945933 |
| 13 | 14 |
| 14 | 77837775 |
| 15 | 14529715216 |
| 16 | 147891744017 |
| 17 | 18 |
| 18 | 13435316294419 |
| 19 | 20 |
| 20 | 7606841430988821 |
| 21 | 16895152834560022 |
| 22 | 183030822374423 |
| 23 | 24 |
| 24 | 387276381308571955225 |
| 25 | 5385836820601036800026 |
| 26 | 485735643993600027 |