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 | 18 |
| 2 | 36 |
| 3 | 72 |
| 4 | 144 |
| 5 | 234 |
| 6 | 288 |
| 7 | 468 |
| 8 | 576 |
| 9 | 936 |
| 10 | 1152 |
| 11 | 1872 |
| 12 | 2304 |
| 13 | 3744 |
| 14 | 4608 |
| 15 | 7488 |
| 16 | 9216 |
| 17 | 14976 |
| 18 | 18432 |
| 19 | 29952 |
| 20 | 36864 |
| 21 | 59904 |
| 22 | 73728 |
| 23 | 119808 |
| 24 | 147456 |
| 25 | 239616 |
| 26 | 294912 |
| 27 | 479232 |
| 28 | 589824 |
| 29 | 958464 |
| 30 | 1179648 |
| 31 | 1916928 |
| 32 | 2359296 |
| 33 | 3833856 |
| 34 | 4718592 |
| 35 | 7667712 |
| 36 | 9437184 |
| 37 | 15335424 |
| 38 | 18874368 |