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 | 9 |
| 2 | 30 |
| 3 | 60 |
| 4 | 120 |
| 5 | 189 |
| 6 | 432 |
| 7 | 630 |
| 8 | 825 |
| 9 | 1122 |
| 10 | 1404 |
| 11 | 2205 |
| 12 | 2760 |
| 13 | 3264 |
| 14 | 3978 |
| 15 | 4617 |
| 16 | 6300 |
| 17 | 7392 |
| 18 | 8349 |
| 19 | 9660 |
| 20 | 10800 |
| 21 | 13689 |
| 22 | 15498 |
| 23 | 17052 |
| 24 | 19140 |
| 25 | 20925 |
| 26 | 25344 |
| 27 | 28050 |
| 28 | 30345 |
| 29 | 33390 |
| 30 | 35964 |
| 31 | 42237 |
| 32 | 46020 |
| 33 | 49200 |
| 34 | 53382 |
| 35 | 56889 |
| 36 | 65340 |
| 37 | 70380 |
| 38 | 74589 |
| 39 | 80088 |
| 40 | 84672 |
| 41 | 95625 |
| 42 | 102102 |
| 43 | 107484 |
| 44 | 114480 |
| 45 | 120285 |
| 46 | 134064 |
| 47 | 142158 |