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 | 7 |
| 5 | 53 |
| 6 | 113 |
| 7 | 16551 |
| 8 | 49766 |
| 9 | 315147 |
| 10 | 364913 |
| 11 | 680060 |
| 12 | 1725033 |
| 13 | 12755291 |
| 14 | 65501488 |
| 15 | 340262731 |
| 16 | 405764219 |
| 17 | 1963319607 |
| 18 | 2369083826 |
| 19 | 6701487259 |
| 20 | 283831548704 |
| 21 | 1425859230779 |
| 22 | 44485467702853 |
| 23 | 45911326933632 |
| 24 | 90396794636485 |
| 25 | 136308121570117 |
| 26 | 908245524057187 |