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 | 1331 |
| 2 | 698896 |
| 3 | 1003003001 |
| 4 | 637832238736 |
| 5 | 1000030000300001 |
| 6 | 1033394994933301 |
| 7 | 1331399339931331 |
| 8 | 4099923883299904 |
| 9 | 1000000300000030000001 |
| 10 | 1003303931991393033001 |
| 11 | 1030331909339091330301 |
| 12 | 1331003993003993001331 |
| 13 | 6916103777337773016196 |