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) |
|---|---|
| 2 | 15 |
| 3 | 5 |
| 4 | 255 |
| 5 | 39 |
| 6 | 1295 |
| 7 | 150 |
| 8 | 4095 |
| 9 | 410 |
| 10 | 9999 |
| 11 | 915 |
| 12 | 20735 |
| 13 | 1785 |
| 14 | 38415 |
| 15 | 3164 |
| 16 | 65535 |
| 17 | 5220 |
| 18 | 104975 |
| 19 | 8145 |
| 20 | 159999 |
| 21 | 12155 |
| 22 | 234255 |
| 23 | 17490 |
| 24 | 331775 |
| 25 | 24414 |
| 26 | 456975 |
| 27 | 33215 |
| 28 | 614655 |
| 29 | 44205 |
| 30 | 809999 |
| 31 | 57720 |
| 32 | 1048575 |
| 33 | 74120 |
| 34 | 1336335 |
| 35 | 93789 |
| 36 | 1679615 |
| 37 | 117135 |