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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 7 |
| 4 | 26 |
| 5 | 98 |
| 6 | 385 |
| 7 | 1569 |
| 8 | 6556 |
| 9 | 27908 |
| 10 | 120624 |
| 11 | 528030 |
| 12 | 2336202 |
| 13 | 10430155 |
| 14 | 46930285 |
| 15 | 212597901 |
| 16 | 968833424 |
| 17 | 4438398734 |
| 18 | 20428750419 |
| 19 | 94424634294 |
| 20 | 438104297376 |
| 21 | 2039690282940 |
| 22 | 9526029685218 |
| 23 | 44617396906698 |
| 24 | 209526541600978 |
| 25 | 986339358246758 |
| 26 | 4653571637230839 |