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 | 11 |
| 2 | 121 |
| 3 | 1118 |
| 4 | 9822 |
| 5 | 85663 |
| 6 | 744272 |
| 7 | 6458585 |
| 8 | 56030742 |
| 9 | 486038270 |
| 10 | 4215998078 |
| 11 | 36570143008 |
| 12 | 317213501163 |
| 13 | 2751542844692 |
| 14 | 23867162292347 |
| 15 | 207026174729348 |
| 16 | 1795765890711121 |
| 17 | 15576654086308004 |
| 18 | 135113465080900087 |