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 | 3 |
| 2 | 7 |
| 3 | 31 |
| 4 | 73 |
| 5 | 127 |
| 6 | 1831 |
| 7 | 1879 |
| 8 | 5869 |
| 9 | 6211 |
| 10 | 8191 |
| 11 | 19609 |
| 12 | 25939 |
| 13 | 28123 |
| 14 | 86293 |
| 15 | 86677 |
| 16 | 88117 |
| 17 | 97213 |
| 18 | 98563 |
| 19 | 98947 |
| 20 | 115783 |
| 21 | 131071 |
| 22 | 268993 |
| 23 | 287281 |
| 24 | 296713 |
| 25 | 321721 |
| 26 | 354997 |
| 27 | 456571 |
| 28 | 505711 |
| 29 | 514783 |
| 30 | 524287 |
| 31 | 1096609 |
| 32 | 1199689 |
| 33 | 1242601 |
| 34 | 1415989 |
| 35 | 1420981 |
| 36 | 1488301 |
| 37 | 1672243 |
| 38 | 1741099 |
| 39 | 1851271 |