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 | 3 |
| 2 | 6 |
| 3 | 36 |
| 4 | 66 |
| 5 | 666 |
| 6 | 22366 |
| 7 | 333336 |
| 8 | 23232336 |
| 9 | 336662326 |
| 10 | 2232222336 |
| 11 | 3263633236 |
| 12 | 6266233326 |
| 13 | 262322266326 |
| 14 | 266633626626 |
| 15 | 2263263223266 |
| 16 | 36226633633326 |
| 17 | 66333362366236266 |
| 18 | 3236622262232626626666 |
| 19 | 3322222636222323322336 |
| 20 | 2332636666226262326336266 |