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 | 286330897 |
| 2 | 10858338851 |
| 3 | 12869802851 |
| 4 | 15845166851 |
| 5 | 29837412851 |
| 6 | 45480846799 |
| 7 | 56676324799 |
| 8 | 56676324863 |
| 9 | 68105187851 |
| 10 | 73915118861 |
| 11 | 114737845853 |
| 12 | 129282912851 |
| 13 | 154648223809 |
| 14 | 155738371853 |
| 15 | 207036953861 |
| 16 | 271077075851 |
| 17 | 358515148853 |
| 18 | 373169411809 |
| 19 | 373169411861 |
| 20 | 395705343799 |