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 | 20 |
| 3 | 292 |
| 4 | 1376 |
| 5 | 6534 |
| 6 | 20004 |
| 7 | 57416 |
| 8 | 133664 |
| 9 | 293770 |
| 10 | 574100 |
| 11 | 1073772 |
| 12 | 1865280 |
| 13 | 3134222 |
| 14 | 5007716 |
| 15 | 7797904 |
| 16 | 11708864 |
| 17 | 17227026 |
| 18 | 24659604 |
| 19 | 34722740 |
| 20 | 47856800 |
| 21 | 65070742 |
| 22 | 86971940 |
| 23 | 114932952 |
| 24 | 149765856 |
| 25 | 193285274 |
| 26 | 246549524 |
| 27 | 311901436 |