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 | 8 |
| 4 | 28 |
| 5 | 128 |
| 6 | 160 |
| 7 | 1264 |
| 8 | 1472 |
| 9 | 1820 |
| 10 | 7168 |
| 11 | 12136 |
| 12 | 26624 |
| 13 | 28288 |
| 14 | 77672 |
| 15 | 419840 |
| 16 | 1835008 |
| 17 | 5095424 |
| 18 | 107521472 |
| 19 | 469762048 |
| 20 | 477218588 |
| 21 | 1195311104 |
| 22 | 12616466432 |
| 23 | 16213648832 |
| 24 | 20361326440 |
| 25 | 115329335296 |
| 26 | 194061037184 |
| 27 | 240257376256 |
| 28 | 304770711552 |