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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 7 |
| 6 | 32 |
| 7 | 34 |
| 8 | 194 |
| 9 | 390 |
| 10 | 2361 |
| 11 | 3970 |
| 12 | 46053 |
| 13 | 66674 |
| 14 | 613403 |
| 15 | 2139340 |
| 16 | 10016638 |
| 17 | 23424252 |
| 18 | 294722828 |
| 19 | 465082930 |
| 20 | 4972759447 |
| 21 | 15773188776 |
| 22 | 90323059973 |
| 23 | 196342666486 |
| 24 | 2587522616960 |
| 25 | 4967200045389 |
| 26 | 39800811833713 |