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 | 5 |
| 2 | 12 |
| 3 | 40 |
| 4 | 96 |
| 5 | 320 |
| 6 | 768 |
| 7 | 2560 |
| 8 | 6144 |
| 9 | 20480 |
| 10 | 49152 |
| 11 | 163840 |
| 12 | 393216 |
| 13 | 1310720 |
| 14 | 3145728 |
| 15 | 10485760 |
| 16 | 25165824 |
| 17 | 83886080 |
| 18 | 201326592 |
| 19 | 671088640 |
| 20 | 1610612736 |
| 21 | 5368709120 |
| 22 | 12884901888 |
| 23 | 42949672960 |
| 24 | 103079215104 |
| 25 | 343597383680 |
| 26 | 824633720832 |