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 | 0 |
| 1 | 18 |
| 2 | 72 |
| 3 | 162 |
| 4 | 288 |
| 5 | 450 |
| 6 | 648 |
| 7 | 882 |
| 8 | 1152 |
| 9 | 1458 |
| 10 | 1800 |
| 11 | 2178 |
| 12 | 2592 |
| 13 | 3042 |
| 14 | 3528 |
| 15 | 4050 |
| 16 | 4608 |
| 17 | 5202 |
| 18 | 5832 |
| 19 | 6498 |
| 20 | 7200 |
| 21 | 7938 |
| 22 | 8712 |
| 23 | 9522 |
| 24 | 10368 |
| 25 | 11250 |
| 26 | 12168 |
| 27 | 13122 |
| 28 | 14112 |
| 29 | 15138 |
| 30 | 16200 |
| 31 | 17298 |
| 32 | 18432 |
| 33 | 19602 |
| 34 | 20808 |
| 35 | 22050 |
| 36 | 23328 |
| 37 | 24642 |
| 38 | 25992 |
| 39 | 27378 |
| 40 | 28800 |
| 41 | 30258 |
| 42 | 31752 |