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 | 4 |
| 2 | 49 |
| 3 | 1024 |
| 4 | 11881 |
| 5 | 15876 |
| 6 | 29241 |
| 7 | 23530332816 |
| 8 | 90070213689 |
| 9 | 165698657721 |
| 10 | 233002186209 |
| 11 | 8246098046404 |
| 12 | 363533405168704 |
| 13 | 24015392820628036 |
| 14 | 48563553937960000 |
| 15 | 6648251155785800089 |
| 16 | 497199122464645742436 |
| 17 | 749745222626569665409 |
| 18 | 10925409774976373110009 |