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 | 9 |
| 2 | 121 |
| 3 | 1665 |
| 4 | 22979 |
| 5 | 317259 |
| 6 | 4380445 |
| 7 | 60481881 |
| 8 | 835088891 |
| 9 | 11530288395 |
| 10 | 159201677509 |
| 11 | 2198138788809 |
| 12 | 30350271502115 |
| 13 | 419054058355851 |
| 14 | 5785987905016141 |
| 15 | 79888633386248025 |
| 16 | 1103043049708026539 |
| 17 | 15230001039404897259 |
| 18 | 210284568423392013685 |
| 19 | 2903453493049800669321 |