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 | 120 |
| 2 | 1442 |
| 3 | 6840 |
| 4 | 21122 |
| 5 | 51000 |
| 6 | 105122 |
| 7 | 194040 |
| 8 | 330242 |
| 9 | 528120 |
| 10 | 804002 |
| 11 | 1176120 |
| 12 | 1664642 |
| 13 | 2291640 |
| 14 | 3081122 |
| 15 | 4059000 |
| 16 | 5253122 |
| 17 | 6693240 |
| 18 | 8411042 |
| 19 | 10440120 |
| 20 | 12816002 |
| 21 | 15576120 |
| 22 | 18759842 |
| 23 | 22408440 |
| 24 | 26565122 |
| 25 | 31275000 |
| 26 | 36585122 |