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 | 0 |
| 1 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 27 |
| 5 | 64 |
| 6 | 149 |
| 7 | 341 |
| 8 | 768 |
| 9 | 1707 |
| 10 | 3755 |
| 11 | 8192 |
| 12 | 17749 |
| 13 | 38229 |
| 14 | 81920 |
| 15 | 174763 |
| 16 | 371371 |
| 17 | 786432 |
| 18 | 1660245 |
| 19 | 3495253 |
| 20 | 7340032 |
| 21 | 15379115 |
| 22 | 32156331 |
| 23 | 67108864 |
| 24 | 139810133 |
| 25 | 290805077 |
| 26 | 603979776 |
| 27 | 1252698795 |
| 28 | 2594876075 |
| 29 | 5368709120 |