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 | 7 |
| 1 | 135 |
| 2 | 391 |
| 3 | 775 |
| 4 | 1287 |
| 5 | 1927 |
| 6 | 2695 |
| 7 | 3591 |
| 8 | 4615 |
| 9 | 5767 |
| 10 | 7047 |
| 11 | 8455 |
| 12 | 9991 |
| 13 | 11655 |
| 14 | 13447 |
| 15 | 15367 |
| 16 | 17415 |
| 17 | 19591 |
| 18 | 21895 |
| 19 | 24327 |
| 20 | 26887 |
| 21 | 29575 |
| 22 | 32391 |
| 23 | 35335 |
| 24 | 38407 |
| 25 | 41607 |
| 26 | 44935 |
| 27 | 48391 |
| 28 | 51975 |
| 29 | 55687 |
| 30 | 59527 |
| 31 | 63495 |
| 32 | 67591 |
| 33 | 71815 |
| 34 | 76167 |
| 35 | 80647 |
| 36 | 85255 |
| 37 | 89991 |
| 38 | 94855 |
| 39 | 99847 |
| 40 | 104967 |