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) |
|---|---|
| 0 | 2 |
| 1 | 29 |
| 2 | 271 |
| 3 | 2719 |
| 4 | 27191 |
| 5 | 271829 |
| 6 | 2718281 |
| 7 | 27182839 |
| 8 | 271828199 |
| 9 | 2718281831 |
| 10 | 27182818309 |
| 11 | 271828182863 |
| 12 | 2718281828489 |
| 13 | 27182818284617 |
| 14 | 271828182845909 |
| 15 | 2718281828459051 |
| 16 | 27182818284590483 |
| 17 | 271828182845904533 |
| 18 | 2718281828459045269 |
| 19 | 27182818284590452387 |
| 20 | 271828182845904523609 |