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 | 1 |
| 2 | 87 |
| 3 | 747 |
| 4 | 4212 |
| 5 | 36981 |
| 6 | 336653 |
| 7 | 2699832 |
| 8 | 21850022 |
| 9 | 183192407 |
| 10 | 1522306495 |
| 11 | 12548589707 |
| 12 | 103837294832 |
| 13 | 860631234338 |
| 14 | 7123554860826 |
| 15 | 58949780986136 |
| 16 | 488030041372421 |
| 17 | 4040237224677767 |
| 18 | 33443991440492758 |
| 19 | 276846422291175139 |