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) |
|---|---|
| 5 | 1 |
| 6 | 19 |
| 7 | 83 |
| 8 | 211 |
| 9 | 467 |
| 10 | 979 |
| 11 | 2003 |
| 12 | 4051 |
| 13 | 8147 |
| 14 | 16339 |
| 15 | 32723 |
| 16 | 65491 |
| 17 | 131027 |
| 18 | 262099 |
| 19 | 524243 |
| 20 | 1048531 |
| 21 | 2097107 |
| 22 | 4194259 |
| 23 | 8388563 |
| 24 | 16777171 |
| 25 | 33554387 |
| 26 | 67108819 |
| 27 | 134217683 |
| 28 | 268435411 |
| 29 | 536870867 |
| 30 | 1073741779 |
| 31 | 2147483603 |
| 32 | 4294967251 |