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) |
|---|---|
| 5 | 1 |
| 6 | 16 |
| 7 | 162 |
| 8 | 1345 |
| 9 | 10096 |
| 10 | 72973 |
| 11 | 531015 |
| 12 | 3984762 |
| 13 | 30987321 |
| 14 | 248303940 |
| 15 | 2036778980 |
| 16 | 17044330217 |
| 17 | 145588640408 |
| 18 | 1272940217747 |
| 19 | 11434350878640 |
| 20 | 105849240653792 |
| 21 | 1011701166471075 |
| 22 | 9987958951272492 |
| 23 | 101765834737586068 |
| 24 | 1068365602976497915 |
| 25 | 11534318293877771406 |