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 | 3 |
| 3 | 4 |
| 4 | 21 |
| 5 | 6 |
| 6 | 367 |
| 7 | 8 |
| 8 | 5129 |
| 9 | 19693 |
| 10 | 106411 |
| 11 | 12 |
| 12 | 9590989 |
| 13 | 14 |
| 14 | 105614223 |
| 15 | 2439477016 |
| 16 | 8590983185 |
| 17 | 18 |
| 18 | 1788338285659 |
| 19 | 20 |
| 20 | 44174380774421 |
| 21 | 1483406745548512 |
| 22 | 584318428289047 |
| 23 | 24 |
| 24 | 2300697575522919961 |
| 25 | 298023223876953151 |
| 26 | 2481152876039086107 |