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 | 172622505 |
| 2 | 6217560734 |
| 3 | 16017860054 |
| 4 | 18102483014 |
| 5 | 20021589510 |
| 6 | 31285993970 |
| 7 | 32576024810 |
| 8 | 39270110990 |
| 9 | 68700877014 |
| 10 | 80170395410 |
| 11 | 81142298930 |
| 12 | 99542647490 |
| 13 | 125182657005 |
| 14 | 144194617490 |
| 15 | 153113328654 |
| 16 | 181335043274 |
| 17 | 318710758730 |
| 18 | 374642686418 |
| 19 | 378482712530 |
| 20 | 455440763414 |