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 | 8194 |
| 3 | 1610710 |
| 4 | 70322090 |
| 5 | 1359736595 |
| 6 | 15709845116 |
| 7 | 126948964044 |
| 8 | 787943896860 |
| 9 | 3990804658005 |
| 10 | 17193665419150 |
| 11 | 64919238324226 |
| 12 | 219638016608374 |
| 13 | 677231901484775 |
| 14 | 1928540559615320 |
| 15 | 5126044286105240 |
| 16 | 12827147639965656 |
| 17 | 30432829026732009 |
| 18 | 68861475279169530 |
| 19 | 149343104993864110 |
| 20 | 311744734708558690 |
| 21 | 628618742162372731 |