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 | 1 |
| 1 | 4 |
| 2 | 5 |
| 3 | 14 |
| 4 | 19 |
| 5 | 90 |
| 6 | 1279 |
| 7 | 5206 |
| 8 | 6485 |
| 9 | 18176 |
| 10 | 24661 |
| 11 | 116820 |
| 12 | 1660141 |
| 13 | 6757384 |
| 14 | 8417525 |
| 15 | 23592434 |
| 16 | 32009959 |
| 17 | 151632270 |
| 18 | 2154861739 |
| 19 | 8771079226 |
| 20 | 10925940965 |
| 21 | 30622961156 |
| 22 | 41548902121 |
| 23 | 196818569640 |
| 24 | 2797008877081 |
| 25 | 11384854077964 |
| 26 | 14181862955045 |
| 27 | 39748579988054 |