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 | 3 |
| 2 | 18 |
| 3 | 30 |
| 4 | 90 |
| 5 | 153 |
| 6 | 204 |
| 7 | 252 |
| 8 | 492 |
| 9 | 735 |
| 10 | 990 |
| 11 | 1242 |
| 12 | 1446 |
| 13 | 1653 |
| 14 | 1848 |
| 15 | 2040 |
| 16 | 3000 |
| 17 | 3963 |
| 18 | 4938 |
| 19 | 5910 |
| 20 | 6930 |
| 21 | 7953 |
| 22 | 8964 |
| 23 | 9972 |
| 24 | 10788 |
| 25 | 11607 |
| 26 | 12438 |
| 27 | 13266 |
| 28 | 14046 |
| 29 | 14829 |
| 30 | 15600 |
| 31 | 16368 |
| 32 | 20208 |
| 33 | 24051 |
| 34 | 27906 |
| 35 | 31758 |
| 36 | 35658 |
| 37 | 39561 |
| 38 | 43452 |
| 39 | 47340 |