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) |
|---|---|
| 3 | 3 |
| 4 | 4 |
| 5 | 15 |
| 6 | 21 |
| 7 | 63 |
| 8 | 92 |
| 9 | 255 |
| 10 | 385 |
| 11 | 1023 |
| 12 | 1585 |
| 13 | 4095 |
| 14 | 6475 |
| 15 | 16383 |
| 16 | 26332 |
| 17 | 65535 |
| 18 | 106761 |
| 19 | 262143 |
| 20 | 431909 |
| 21 | 1048575 |
| 22 | 1744435 |
| 23 | 4194303 |
| 24 | 7036529 |
| 25 | 16777215 |
| 26 | 28354131 |
| 27 | 67108863 |
| 28 | 114159427 |
| 29 | 268435455 |
| 30 | 459312151 |
| 31 | 1073741823 |
| 32 | 1846943452 |
| 33 | 4294967295 |
| 34 | 7423131481 |
| 35 | 17179869183 |