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 | 512 |
| 2 | 20195 |
| 3 | 1973320 |
| 4 | 42326927 |
| 5 | 2400274618 |
| 6 | 13004773991 |
| 7 | 131592650488 |
| 8 | 454280348267 |
| 9 | 2255433009730 |
| 10 | 16762578985599 |
| 11 | 43202201146270 |
| 12 | 173163940941347 |
| 13 | 500545875335308 |
| 14 | 1003138487272151 |
| 15 | 2122268960374918 |
| 16 | 5422032552177051 |
| 17 | 14085028370831990 |
| 18 | 25779174463666131 |