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 | 40 |
| 2 | 1947 |
| 3 | 58904 |
| 4 | 1410818 |
| 5 | 28637916 |
| 6 | 506031118 |
| 7 | 7907770636 |
| 8 | 110655824716 |
| 9 | 1401584381570 |
| 10 | 16222274394016 |
| 11 | 173007912264684 |
| 12 | 1712497545142699 |
| 13 | 15831976807688826 |
| 14 | 137451501603516285 |
| 15 | 1125976516897709842 |