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 | 31 |
| 3 | 121 |
| 4 | 511 |
| 5 | 781 |
| 6 | 3751 |
| 7 | 2801 |
| 8 | 8191 |
| 9 | 9841 |
| 10 | 24211 |
| 11 | 16105 |
| 12 | 61831 |
| 13 | 30941 |
| 14 | 86831 |
| 15 | 94501 |
| 16 | 131071 |
| 17 | 88741 |
| 18 | 305071 |
| 19 | 137561 |
| 20 | 399091 |
| 21 | 338921 |
| 22 | 499255 |
| 23 | 292561 |
| 24 | 991111 |
| 25 | 488281 |
| 26 | 959171 |
| 27 | 797161 |
| 28 | 1431311 |
| 29 | 732541 |
| 30 | 2929531 |
| 31 | 954305 |
| 32 | 2097151 |
| 33 | 1948705 |
| 34 | 2750971 |
| 35 | 2187581 |