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 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 15 |
| 6 | 6 |
| 7 | 7 |
| 8 | 1 |
| 9 | 63 |
| 10 | 30 |
| 11 | 341 |
| 12 | 12 |
| 13 | 819 |
| 14 | 14 |
| 15 | 15 |
| 16 | 1 |
| 17 | 255 |
| 18 | 126 |
| 19 | 9709 |
| 20 | 60 |
| 21 | 63 |
| 22 | 682 |
| 23 | 2047 |
| 24 | 24 |
| 25 | 25575 |
| 26 | 1638 |
| 27 | 13797 |
| 28 | 28 |
| 29 | 475107 |
| 30 | 30 |
| 31 | 31 |
| 32 | 1 |
| 33 | 1023 |
| 34 | 510 |
| 35 | 4095 |
| 36 | 252 |
| 37 | 3233097 |
| 38 | 19418 |
| 39 | 4095 |
| 40 | 120 |
| 41 | 41943 |
| 42 | 126 |
| 43 | 5461 |
| 44 | 1364 |
| 45 | 4095 |
| 46 | 4094 |
| 47 | 8388607 |
| 48 | 48 |
| 49 | 2097151 |
| 50 | 51150 |
| 51 | 255 |
| 52 | 3276 |
| 53 | 3556769739 |
| 54 | 27594 |
| 55 | 1048575 |