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 | 1 |
| 2 | 20 |
| 3 | 323 |
| 4 | 5414 |
| 5 | 133053 |
| 6 | 2351320 |
| 7 | 42243331 |
| 8 | 1120335530 |
| 9 | 20130035113 |
| 10 | 5401014424514 |
| 11 | 2343052550252003 |
| 12 | 1114323133240053240 |
| 13 | 321321022332303252301 |
| 14 | 132140014431255340214310 |
| 15 | 42015444551405453142112503 |