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 | 3 |
| 3 | 9 |
| 4 | 12 |
| 5 | 30 |
| 6 | 36 |
| 7 | 81 |
| 8 | 84 |
| 9 | 156 |
| 10 | 228 |
| 11 | 246 |
| 12 | 324 |
| 13 | 396 |
| 14 | 444 |
| 15 | 516 |
| 16 | 534 |
| 17 | 606 |
| 18 | 774 |
| 19 | 804 |
| 20 | 876 |
| 21 | 1164 |
| 22 | 1614 |
| 23 | 1884 |
| 24 | 2046 |
| 25 | 2244 |
| 26 | 2676 |
| 27 | 3564 |
| 28 | 3684 |
| 29 | 3756 |
| 30 | 4134 |
| 31 | 4404 |
| 32 | 4764 |
| 33 | 5124 |
| 34 | 5646 |
| 35 | 6636 |
| 36 | 6654 |
| 37 | 6924 |
| 38 | 7716 |
| 39 | 8166 |
| 40 | 8724 |
| 41 | 9804 |
| 42 | 10686 |
| 43 | 11334 |
| 44 | 12324 |
| 45 | 12846 |
| 46 | 13476 |
| 47 | 15654 |
| 48 | 17004 |
| 49 | 17796 |
| 50 | 18804 |
| 51 | 20406 |
| 52 | 20694 |
| 53 | 21036 |