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) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 348 |
| 3 | 3824 |
| 4 | 34974 |
| 5 | 279360 |
| 6 | 2007496 |
| 7 | 13236528 |
| 8 | 81211749 |
| 9 | 468506720 |
| 10 | 2561834052 |
| 11 | 13362262272 |
| 12 | 66823739654 |
| 13 | 321763781664 |
| 14 | 1497035306088 |
| 15 | 6750151072304 |
| 16 | 29572851319506 |
| 17 | 126163172338056 |
| 18 | 525134328872668 |