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 | 11 |
| 1 | 54 |
| 2 | 161 |
| 3 | 396 |
| 4 | 887 |
| 5 | 1890 |
| 6 | 3917 |
| 7 | 7992 |
| 8 | 16163 |
| 9 | 32526 |
| 10 | 65273 |
| 11 | 130788 |
| 12 | 261839 |
| 13 | 523962 |
| 14 | 1048229 |
| 15 | 2096784 |
| 16 | 4193915 |
| 17 | 8388198 |
| 18 | 16776785 |
| 19 | 33553980 |
| 20 | 67108391 |
| 21 | 134217234 |
| 22 | 268434941 |
| 23 | 536870376 |
| 24 | 1073741267 |
| 25 | 2147483070 |
| 26 | 4294966697 |
| 27 | 8589933972 |
| 28 | 17179868543 |
| 29 | 34359737706 |