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 | 20 |
| 2 | 2020 |
| 3 | 206040 |
| 4 | 21014040 |
| 5 | 2143226060 |
| 6 | 218588044060 |
| 7 | 22293837268080 |
| 8 | 2273752813300080 |
| 9 | 231900493119340100 |
| 10 | 23651576545359390100 |
| 11 | 2412228907133538450120 |
| 12 | 246023696951075562522120 |
| 13 | 25092004860102573838806140 |
| 14 | 2559138472033511455995704140 |