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 | 85 |
| 3 | 665 |
| 4 | 5793 |
| 5 | 49302 |
| 6 | 420519 |
| 7 | 3590821 |
| 8 | 30650456 |
| 9 | 261518933 |
| 10 | 2232138695 |
| 11 | 19050970320 |
| 12 | 162588578831 |
| 13 | 1387635803762 |
| 14 | 11842933188678 |
| 15 | 101074697830670 |
| 16 | 862633152321378 |
| 17 | 7362232721371648 |
| 18 | 62833751476788374 |
| 19 | 536261351701937815 |