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 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 22 |
| 4 | 64 |
| 5 | 181 |
| 6 | 512 |
| 7 | 1448 |
| 8 | 4096 |
| 9 | 11585 |
| 10 | 32768 |
| 11 | 92681 |
| 12 | 262144 |
| 13 | 741455 |
| 14 | 2097152 |
| 15 | 5931641 |
| 16 | 16777216 |
| 17 | 47453132 |
| 18 | 134217728 |
| 19 | 379625062 |
| 20 | 1073741824 |
| 21 | 3037000499 |
| 22 | 8589934592 |
| 23 | 24296003999 |
| 24 | 68719476736 |