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 | 0 |
| 2 | 1 |
| 3 | 31 |
| 4 | 32 |
| 5 | 211 |
| 6 | 242 |
| 7 | 243 |
| 8 | 781 |
| 9 | 992 |
| 10 | 1023 |
| 11 | 1024 |
| 12 | 2101 |
| 13 | 2882 |
| 14 | 3093 |
| 15 | 3124 |
| 16 | 3125 |
| 17 | 4651 |
| 18 | 6752 |
| 19 | 7533 |
| 20 | 7744 |
| 21 | 7775 |
| 22 | 7776 |
| 23 | 9031 |
| 24 | 13682 |
| 25 | 15783 |
| 26 | 15961 |
| 27 | 16564 |
| 28 | 16775 |
| 29 | 16806 |
| 30 | 16807 |
| 31 | 24992 |
| 32 | 26281 |
| 33 | 29643 |
| 34 | 31744 |
| 35 | 32525 |
| 36 | 32736 |
| 37 | 32767 |
| 38 | 32768 |
| 39 | 40951 |
| 40 | 42242 |