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 | 2 |
| 3 | 3 |
| 4 | 8 |
| 5 | 99 |
| 6 | 33102 |
| 7 | 66317 |
| 8 | 265381 |
| 9 | 1360120 |
| 10 | 25510582 |
| 11 | 78256779 |
| 12 | 156513558 |
| 13 | 209259755 |
| 14 | 340262731 |
| 15 | 1963319607 |
| 16 | 6701487259 |
| 17 | 8664806866 |
| 18 | 13402974518 |
| 19 | 20104461777 |
| 20 | 26805949036 |
| 21 | 33507436295 |
| 22 | 40208923554 |
| 23 | 46910410813 |