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 | 3 |
| 2 | 24 |
| 3 | 312 |
| 4 | 936 |
| 5 | 21528 |
| 6 | 150696 |
| 7 | 1657656 |
| 8 | 31495464 |
| 9 | 1354304952 |
| 10 | 2708609904 |
| 11 | 143556324912 |
| 12 | 4163133422448 |
| 13 | 1387711140816 |
| 14 | 23591089393872 |
| 15 | 1722149525752656 |
| 16 | 574049841917552 |
| 17 | 47646136879156816 |
| 18 | 4331466989014256 |