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) |
|---|---|
| 4 | 1 |
| 5 | 5 |
| 6 | 14 |
| 7 | 28 |
| 8 | 42 |
| 9 | 174 |
| 10 | 735 |
| 11 | 3155 |
| 12 | 13726 |
| 13 | 60398 |
| 14 | 268361 |
| 15 | 1202425 |
| 16 | 5427110 |
| 17 | 24652698 |
| 18 | 112622124 |
| 19 | 517102008 |
| 20 | 2385026330 |
| 21 | 11045344150 |
| 22 | 51341255630 |
| 23 | 239447037890 |
| 24 | 1120163788030 |
| 25 | 5254987411850 |
| 26 | 24716226207075 |