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) |
|---|---|
| 0 | 18 |
| 1 | 1 |
| 2 | 199 |
| 3 | 1300 |
| 4 | 18995 |
| 5 | 199821 |
| 6 | 2406862 |
| 7 | 27285777 |
| 8 | 317960739 |
| 9 | 3658040968 |
| 10 | 42338077399 |
| 11 | 488631332773 |
| 12 | 5646974285234 |
| 13 | 65218753680549 |
| 14 | 753462136109959 |
| 15 | 8703368091760320 |
| 16 | 100541026090416195 |
| 17 | 1161408360176875825 |
| 18 | 13416320242101088558 |
| 19 | 154981059170079355117 |