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 | 19 |
| 2 | 47 |
| 3 | 83 |
| 4 | 397 |
| 5 | 1721 |
| 6 | 229627 |
| 7 | 21827567 |
| 8 | 295540237 |
| 9 | 13299311017 |
| 10 | 678264862267 |
| 11 | 3879320022245629336367 |
| 12 | 817800727933873464057151867 |
| 13 | 85869076433056713726000946867 |
| 14 | 9531467484069295223586105103117 |
| 15 | 15873007435437477980505511601565617 |