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 | 0 |
| 2 | 1 |
| 3 | 126 |
| 4 | 1168 |
| 5 | 7334 |
| 6 | 35749 |
| 7 | 137970 |
| 8 | 438984 |
| 9 | 1208246 |
| 10 | 2969389 |
| 11 | 6662480 |
| 12 | 13873100 |
| 13 | 27144408 |
| 14 | 50389581 |
| 15 | 89424014 |
| 16 | 152638280 |
| 17 | 251834530 |
| 18 | 403250693 |
| 19 | 628798516 |
| 20 | 957543164 |
| 21 | 1427453780 |
| 22 | 2087456085 |
| 23 | 2999819778 |
| 24 | 4242915176 |