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 | -80 |
| 1 | -79 |
| 2 | -77 |
| 3 | -73 |
| 4 | -65 |
| 5 | -49 |
| 6 | -17 |
| 7 | 47 |
| 8 | 175 |
| 9 | 431 |
| 10 | 943 |
| 11 | 1967 |
| 12 | 4015 |
| 13 | 8111 |
| 14 | 16303 |
| 15 | 32687 |
| 16 | 65455 |
| 17 | 130991 |
| 18 | 262063 |
| 19 | 524207 |
| 20 | 1048495 |
| 21 | 2097071 |
| 22 | 4194223 |
| 23 | 8388527 |
| 24 | 16777135 |
| 25 | 33554351 |
| 26 | 67108783 |
| 27 | 134217647 |
| 28 | 268435375 |
| 29 | 536870831 |
| 30 | 1073741743 |
| 31 | 2147483567 |
| 32 | 4294967215 |