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 | 2047 |
| 2 | 1373653 |
| 3 | 25326001 |
| 4 | 3215031751 |
| 5 | 2152302898747 |
| 6 | 3474749660383 |
| 7 | 341550071728321 |
| 8 | 341550071728321 |
| 9 | 3825123056546413051 |
| 10 | 3825123056546413051 |
| 11 | 3825123056546413051 |
| 12 | 318665857834031151167461 |
| 13 | 3317044064679887385961981 |