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) |
|---|---|
| 3 | 224 |
| 4 | 3108 |
| 5 | 9922 |
| 6 | 90176 |
| 7 | 401998 |
| 8 | 3113860 |
| 9 | 16091936 |
| 10 | 114557000 |
| 11 | 643041038 |
| 12 | 4357599552 |
| 13 | 25689719122 |
| 14 | 169094614280 |
| 15 | 1026275640544 |
| 16 | 6640849944580 |
| 17 | 40998347400722 |
| 18 | 262671237617216 |
| 19 | 1637828186763038 |
| 20 | 10433179552323108 |
| 21 | 65428999765032736 |
| 22 | 415409841636546440 |
| 23 | 2613799160004664798 |
| 24 | 16563343174199239744 |