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 | 2 |
| 2 | 22 |
| 3 | 242 |
| 4 | 2662 |
| 5 | 29282 |
| 6 | 322102 |
| 7 | 3543122 |
| 8 | 38974342 |
| 9 | 428717762 |
| 10 | 4715895382 |
| 11 | 51874849202 |
| 12 | 570623341222 |
| 13 | 6276856753442 |
| 14 | 69045424287862 |
| 15 | 759499667166482 |
| 16 | 8354496338831302 |
| 17 | 91899459727144322 |
| 18 | 1010894056998587542 |
| 19 | 11119834626984462962 |
| 20 | 122318180896829092582 |