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 | 1 |
| 1 | 101 |
| 2 | 10201 |
| 3 | 1030301 |
| 4 | 104060401 |
| 5 | 10510100501 |
| 6 | 1061520150601 |
| 7 | 107213535210701 |
| 8 | 10828567056280801 |
| 9 | 1093685272684360901 |
| 10 | 110462212541120451001 |
| 11 | 11156683466653165551101 |
| 12 | 1126825030131969720661201 |
| 13 | 113809328043328941786781301 |
| 14 | 11494742132376223120464911401 |
| 15 | 1160968955369998535166956051501 |