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 | 11 |
| 2 | 211 |
| 3 | 4211 |
| 4 | 34211 |
| 5 | 534211 |
| 6 | 9534211 |
| 7 | 19534211 |
| 8 | 3019534211 |
| 9 | 63019534211 |
| 10 | 2063019534211 |
| 11 | 162063019534211 |
| 12 | 8162063019534211 |
| 13 | 248162063019534211 |
| 14 | 15248162063019534211 |
| 15 | 1315248162063019534211 |
| 16 | 391315248162063019534211 |