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 | 25 |
| 2 | 269 |
| 3 | 2714 |
| 4 | 27177 |
| 5 | 271822 |
| 6 | 2718274 |
| 7 | 27182809 |
| 8 | 271828173 |
| 9 | 2718281817 |
| 10 | 27182818272 |
| 11 | 271828182832 |
| 12 | 2718281828444 |
| 13 | 27182818284575 |
| 14 | 271828182845887 |
| 15 | 2718281828459027 |
| 16 | 27182818284590433 |
| 17 | 271828182845904503 |