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 | 54481005 |
| 10 | 490329055 |
| 11 | 4412961506 |
| 12 | 39716653566 |
| 13 | 357449882107 |
| 14 | 3217048938977 |
| 15 | 28953440450808 |
| 16 | 260580964057288 |
| 17 | 2345228676515609 |
| 18 | 21107058088640499 |
| 19 | 189963522797764510 |
| 20 | 1709671705179880610 |
| 21 | 15387045346618925511 |
| 22 | 138483408119570329621 |