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) |
|---|---|
| 0 | 7 |
| 1 | 28 |
| 2 | 112 |
| 3 | 448 |
| 4 | 1792 |
| 5 | 7168 |
| 6 | 28672 |
| 7 | 114688 |
| 8 | 458752 |
| 9 | 1835008 |
| 10 | 7340032 |
| 11 | 29360128 |
| 12 | 117440512 |
| 13 | 469762048 |
| 14 | 1879048192 |
| 15 | 7516192768 |
| 16 | 30064771072 |
| 17 | 120259084288 |
| 18 | 481036337152 |
| 19 | 1924145348608 |
| 20 | 7696581394432 |
| 21 | 30786325577728 |
| 22 | 123145302310912 |
| 23 | 492581209243648 |