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 | 182 |
| 3 | 2366 |
| 4 | 30667 |
| 5 | 397488 |
| 6 | 5152056 |
| 7 | 66777984 |
| 8 | 865538310 |
| 9 | 11218616136 |
| 10 | 145409328792 |
| 11 | 1884713116104 |
| 12 | 24428580744204 |
| 13 | 316629386210592 |
| 14 | 4103970233205024 |
| 15 | 53193330778861728 |
| 16 | 689461735481280216 |
| 17 | 8936411345795737440 |
| 18 | 115828687266480560736 |
| 19 | 1501305644372339725920 |