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 | 72 |
| 2 | 1072 |
| 3 | 6968 |
| 4 | 28320 |
| 5 | 85992 |
| 6 | 214864 |
| 7 | 467544 |
| 8 | 918080 |
| 9 | 1665672 |
| 10 | 2838384 |
| 11 | 4596856 |
| 12 | 7138016 |
| 13 | 10698792 |
| 14 | 15559824 |
| 15 | 22049176 |
| 16 | 30546048 |
| 17 | 41484488 |
| 18 | 55357104 |
| 19 | 72718776 |
| 20 | 94190368 |
| 21 | 120462440 |
| 22 | 152298960 |