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) |
|---|---|
| 4 | 4 |
| 5 | 10 |
| 6 | 24 |
| 7 | 56 |
| 8 | 128 |
| 9 | 288 |
| 10 | 640 |
| 11 | 1408 |
| 12 | 3072 |
| 13 | 6656 |
| 14 | 14336 |
| 15 | 30720 |
| 16 | 65536 |
| 17 | 139264 |
| 18 | 294912 |
| 19 | 622592 |
| 20 | 1310720 |
| 21 | 2752512 |
| 22 | 5767168 |
| 23 | 12058624 |
| 24 | 25165824 |
| 25 | 52428800 |
| 26 | 109051904 |
| 27 | 226492416 |
| 28 | 469762048 |
| 29 | 973078528 |
| 30 | 2013265920 |
| 31 | 4160749568 |
| 32 | 8589934592 |
| 33 | 17716740096 |
| 34 | 36507222016 |