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 | 11 |
| 3 | 102 |
| 4 | 922 |
| 5 | 8303 |
| 6 | 74733 |
| 7 | 672604 |
| 8 | 6053444 |
| 9 | 54480997 |
| 10 | 490328973 |
| 11 | 4412960758 |
| 12 | 39716646823 |
| 13 | 357449821408 |
| 14 | 3217048392674 |
| 15 | 28953435534067 |
| 16 | 260580919806606 |
| 17 | 2345228278259455 |
| 18 | 21107054504335099 |
| 19 | 189963490539015892 |