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 | 53 |
| 2 | 311 |
| 3 | 8161 |
| 4 | 180503 |
| 5 | 71378569 |
| 6 | 1339484197 |
| 7 | 442795487221 |
| 8 | 7877263558621 |
| 9 | 2420094683001859 |
| 10 | 12375982557205846193 |
| 11 | 211104554420210305087 |
| 12 | 1025087216809475771050003 |