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 | 7 |
| 2 | 71 |
| 3 | 173 |
| 4 | 3719 |
| 5 | 91733 |
| 6 | 3371947 |
| 7 | 749173303 |
| 8 | 3033719477 |
| 9 | 774917330303 |
| 10 | 30303371947759 |
| 11 | 957749173303031 |
| 12 | 13030337194775911 |
| 13 | 1195774917330303119 |
| 14 | 9113030337194775911093 |
| 15 | 390119577491733030311941 |