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 | 70 |
| 4 | 70 |
| 5 | 836 |
| 6 | 4030 |
| 7 | 17272 |
| 8 | 836 |
| 9 | 7912 |
| 10 | 7192 |
| 11 | 4030 |
| 12 | 113072 |
| 13 | 83312 |
| 14 | 7912 |
| 15 | 8812312 |
| 16 | 5830 |
| 17 | 4199030 |
| 18 | 9272 |
| 19 | 91388 |
| 20 | 10792 |
| 21 | 23941578736 |
| 22 | 786208 |
| 23 | 682592 |
| 24 | 569494624 |
| 25 | 555616 |
| 26 | 539744 |
| 27 | 15126992 |
| 28 | 73616 |
| 29 | 519712 |