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 | 9 |
| 1 | 91 |
| 2 | 1911 |
| 3 | 55261 |
| 4 | 1813539 |
| 5 | 62672701 |
| 6 | 2214363531 |
| 7 | 79017297541 |
| 8 | 2832604648419 |
| 9 | 101763873519661 |
| 10 | 3659794373013051 |
| 11 | 131686747008947221 |
| 12 | 4739547370427122899 |
| 13 | 170602660692644492221 |
| 14 | 6141318334706291980971 |