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 | 26 |
| 3 | 212 |
| 4 | 1198 |
| 5 | 5842 |
| 6 | 26630 |
| 7 | 116992 |
| 8 | 502492 |
| 9 | 2126238 |
| 10 | 8903350 |
| 11 | 36998056 |
| 12 | 152862180 |
| 13 | 628749892 |
| 14 | 2576996188 |
| 15 | 10531805664 |
| 16 | 42940549576 |
| 17 | 174734720374 |
| 18 | 709858318486 |
| 19 | 2879728611544 |
| 20 | 11668224303796 |
| 21 | 47228199967804 |