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 | 2 |
| 1 | 13 |
| 2 | 109 |
| 3 | 1027 |
| 4 | 10081 |
| 5 | 100243 |
| 6 | 1000729 |
| 7 | 10002187 |
| 8 | 100006561 |
| 9 | 1000019683 |
| 10 | 10000059049 |
| 11 | 100000177147 |
| 12 | 1000000531441 |
| 13 | 10000001594323 |
| 14 | 100000004782969 |
| 15 | 1000000014348907 |
| 16 | 10000000043046721 |
| 17 | 100000000129140163 |
| 18 | 1000000000387420489 |
| 19 | 10000000001162261467 |