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 | -1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 7 |
| 4 | 31 |
| 5 | 41 |
| 6 | 137 |
| 7 | 151 |
| 8 | 391 |
| 9 | 409 |
| 10 | 889 |
| 11 | 911 |
| 12 | 1751 |
| 13 | 1777 |
| 14 | 3121 |
| 15 | 3151 |
| 16 | 5167 |
| 17 | 5201 |
| 18 | 8081 |
| 19 | 8119 |
| 20 | 12079 |
| 21 | 12121 |
| 22 | 17401 |
| 23 | 17447 |
| 24 | 24311 |
| 25 | 24361 |
| 26 | 33097 |
| 27 | 33151 |
| 28 | 44071 |
| 29 | 44129 |
| 30 | 57569 |
| 31 | 57631 |
| 32 | 73951 |
| 33 | 74017 |
| 34 | 93601 |
| 35 | 93671 |
| 36 | 116927 |
| 37 | 117001 |
| 38 | 144361 |
| 39 | 144439 |
| 40 | 176359 |
| 41 | 176441 |
| 42 | 213401 |
| 43 | 213487 |
| 44 | 255991 |