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 | 14 |
| 2 | 116 |
| 3 | 944 |
| 4 | 7856 |
| 5 | 66824 |
| 6 | 578096 |
| 7 | 5062904 |
| 8 | 44726336 |
| 9 | 397498184 |
| 10 | 3547250576 |
| 11 | 31743856664 |
| 12 | 284606318816 |
| 13 | 2554926522344 |
| 14 | 22955156619056 |
| 15 | 206361317079224 |
| 16 | 1855841298759296 |
| 17 | 16694108359111304 |
| 18 | 150196195253667536 |