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 | 1 |
| 2 | 131069 |
| 3 | 17179082761 |
| 4 | 17183408101 |
| 5 | 34345582673 |
| 6 | 53083917 |
| 7 | 16988766937 |
| 8 | 17848727413 |
| 9 | 32066509217 |
| 10 | 7739650845 |
| 11 | 25740764841 |
| 12 | 33596591109 |
| 13 | 30610037745 |
| 14 | 12186659885 |
| 15 | 12166953849 |
| 16 | 6296898965 |
| 17 | 7334844225 |
| 18 | 19577928253 |
| 19 | 5497393481 |
| 20 | 14152584229 |
| 21 | 20226775953 |