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 | 2187 |
| 2 | 419904 |
| 3 | 4634768 |
| 4 | 22071219 |
| 5 | 80083648 |
| 6 | 268379906 |
| 7 | 911404794 |
| 8 | 3202146197 |
| 9 | 11485486125 |
| 10 | 41212527412 |
| 11 | 145413457614 |
| 12 | 498294091308 |
| 13 | 1645129036705 |
| 14 | 5209884539118 |
| 15 | 15798173688229 |
| 16 | 45874155195909 |
| 17 | 127717720870044 |