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 | 5171 |
| 2 | 16402481 |
| 3 | 467943389 |
| 4 | 504990743 |
| 5 | 749554829 |
| 6 | 857435471 |
| 7 | 2430292727 |
| 8 | 4486052477 |
| 9 | 6659865623 |
| 10 | 7064402441 |
| 11 | 7487094743 |
| 12 | 13947137557 |
| 13 | 21257639959 |
| 14 | 30293402473 |
| 15 | 79101562439 |
| 16 | 155450409929 |
| 17 | 169935221737 |
| 18 | 440301256697 |
| 19 | 1010752751017 |
| 20 | 1086948034597 |