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 | 7182818284 |
| 2 | 8182845904 |
| 3 | 8747135266 |
| 4 | 7427466391 |
| 5 | 5966290435 |
| 6 | 2952605956 |
| 7 | 753907774 |
| 8 | 777449920 |
| 9 | 3069697720 |
| 10 | 1252389784 |
| 11 | 3163688923 |
| 12 | 9229576351 |
| 13 | 4822082698 |
| 14 | 8879332036 |
| 15 | 6832823764 |
| 16 | 8328237646 |
| 17 | 8194558153 |
| 18 | 2509961818 |