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 | 269 |
| 3 | 41837 |
| 4 | 36626159 |
| 5 | 154578947 |
| 6 | 2155054465 |
| 7 | 19410890423 |
| 8 | 30691222355 |
| 9 | 247555091527 |
| 10 | 2201220228533 |
| 11 | 227735225320519 |
| 12 | 478444326378215 |