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 | 3 |
| 4 | 7 |
| 5 | 10 |
| 6 | 15 |
| 7 | 31 |
| 8 | 63 |
| 9 | 127 |
| 10 | 153 |
| 11 | 170 |
| 12 | 204 |
| 13 | 255 |
| 14 | 292 |
| 15 | 365 |
| 16 | 438 |
| 17 | 511 |
| 18 | 1023 |
| 19 | 2047 |
| 20 | 2275 |
| 21 | 2405 |
| 22 | 2470 |
| 23 | 2665 |
| 24 | 2730 |
| 25 | 2860 |
| 26 | 3185 |
| 27 | 3250 |
| 28 | 3380 |
| 29 | 3640 |
| 30 | 4095 |
| 31 | 8191 |
| 32 | 16383 |
| 33 | 32767 |
| 34 | 34695 |
| 35 | 34952 |
| 36 | 35723 |
| 37 | 36237 |
| 38 | 36494 |
| 39 | 37779 |
| 40 | 38293 |
| 41 | 38550 |
| 42 | 39321 |
| 43 | 39578 |
| 44 | 40092 |
| 45 | 41891 |
| 46 | 42405 |
| 47 | 42662 |
| 48 | 43433 |
| 49 | 43690 |