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 | 5 |
| 3 | 29 |
| 4 | 209 |
| 5 | 2309 |
| 6 | 30029 |
| 7 | 510509 |
| 8 | 9699689 |
| 9 | 223092869 |
| 10 | 6469693229 |
| 11 | 200560490129 |
| 12 | 7420738134809 |
| 13 | 304250263527209 |
| 14 | 13082761331670029 |
| 15 | 614889782588491409 |
| 16 | 32589158477190044729 |
| 17 | 1922760350154212639069 |
| 18 | 117288381359406970983269 |
| 19 | 7858321551080267055879089 |