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 | 2 |
| 2 | 3 |
| 3 | 7 |
| 4 | 31 |
| 5 | 991 |
| 6 | 1951 |
| 7 | 2521 |
| 8 | 7411 |
| 9 | 23431 |
| 10 | 26731 |
| 11 | 37441 |
| 12 | 92431 |
| 13 | 131071 |
| 14 | 396631 |
| 15 | 489061 |
| 16 | 532141 |
| 17 | 830551 |
| 18 | 2811691 |
| 19 | 3319171 |
| 20 | 3698941 |
| 21 | 4247167 |
| 22 | 5239411 |
| 23 | 6829681 |
| 24 | 8326711 |
| 25 | 8997871 |
| 26 | 12625831 |
| 27 | 12889231 |
| 28 | 14756743 |
| 29 | 15891121 |
| 30 | 16125721 |
| 31 | 16446301 |
| 32 | 21203071 |