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 | 153 |
| 3 | 1570 |
| 4 | 15821 |
| 5 | 158574 |
| 6 | 1586833 |
| 7 | 15871610 |
| 8 | 158725941 |
| 9 | 1587288934 |
| 10 | 15872977913 |
| 11 | 158730044850 |
| 12 | 1587301245661 |
| 13 | 15873014848094 |
| 14 | 158730155655393 |
| 15 | 1587301578077290 |
| 16 | 15873015845342981 |
| 17 | 158730158647140054 |
| 18 | 1587301587052531273 |
| 19 | 15873015872268704930 |