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 | 156 |
| 3 | 1622 |
| 4 | 16347 |
| 5 | 161970 |
| 6 | 1588176 |
| 7 | 15465222 |
| 8 | 149866020 |
| 9 | 1447117432 |
| 10 | 13935821924 |
| 11 | 133921143546 |
| 12 | 1284811863298 |
| 13 | 12309517103724 |
| 14 | 117803253946752 |
| 15 | 1126336913303526 |
| 16 | 10760609522499660 |
| 17 | 102733711144434216 |
| 18 | 980250448431562864 |
| 19 | 9348504508099893272 |