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) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 5 |
| 5 | 17 |
| 6 | 29 |
| 7 | 65 |
| 8 | 117 |
| 9 | 261 |
| 10 | 497 |
| 11 | 1025 |
| 12 | 2017 |
| 13 | 4097 |
| 14 | 8129 |
| 15 | 16405 |
| 16 | 32629 |
| 17 | 65537 |
| 18 | 130845 |
| 19 | 262145 |
| 20 | 523765 |
| 21 | 1048645 |
| 22 | 2096129 |
| 23 | 4194305 |
| 24 | 8386641 |
| 25 | 16777233 |
| 26 | 33550337 |
| 27 | 67109125 |
| 28 | 134209477 |
| 29 | 268435457 |
| 30 | 536855053 |
| 31 | 1073741825 |
| 32 | 2147450741 |
| 33 | 4294968325 |
| 34 | 8589869057 |