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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 12 |
| 6 | 42 |
| 7 | 52 |
| 8 | 84 |
| 9 | 156 |
| 10 | 186 |
| 11 | 372 |
| 12 | 1092 |
| 13 | 1218 |
| 14 | 1302 |
| 15 | 1806 |
| 16 | 2436 |
| 17 | 2604 |
| 18 | 2756 |
| 19 | 3612 |
| 20 | 4836 |
| 21 | 5334 |
| 22 | 7212 |
| 23 | 8268 |
| 24 | 10668 |
| 25 | 12324 |
| 26 | 15918 |
| 27 | 18858 |
| 28 | 24492 |
| 29 | 31668 |
| 30 | 31836 |
| 31 | 33852 |
| 32 | 37716 |
| 33 | 37758 |
| 34 | 46956 |
| 35 | 50484 |
| 36 | 52374 |
| 37 | 55986 |
| 38 | 57876 |
| 39 | 71862 |
| 40 | 75516 |
| 41 | 86268 |