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 | 11 |
| 2 | 31 |
| 3 | 151 |
| 4 | 911 |
| 5 | 541 |
| 6 | 3641 |
| 7 | 272611 |
| 8 | 18451 |
| 9 | 12760031 |
| 10 | 7947701 |
| 11 | 767131 |
| 12 | 4106261531 |
| 13 | 28144128251 |
| 14 | 34379101 |
| 15 | 120196353941 |
| 16 | 823837075741 |
| 17 | 51164521 |
| 18 | 4215154433351 |
| 19 | 2918000731816531 |
| 20 | 73998076231 |
| 21 | 12462174208709101 |
| 22 | 939587136717207031 |
| 23 | 3467131047901 |