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 | 19 |
| 3 | 216 |
| 4 | 2725 |
| 5 | 36446 |
| 6 | 505861 |
| 7 | 7204874 |
| 8 | 104592937 |
| 9 | 1540820542 |
| 10 | 22964779660 |
| 11 | 345532572678 |
| 12 | 5239988770268 |
| 13 | 79992676367108 |
| 14 | 1228088671826973 |
| 15 | 18946775782611174 |
| 16 | 293560133910477776 |
| 17 | 4565553929115769162 |
| 18 | 71242712815411950635 |