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 | 3 |
| 2 | 7 |
| 3 | 15 |
| 4 | 31 |
| 5 | 63 |
| 6 | 127 |
| 7 | 219 |
| 8 | 255 |
| 9 | 291 |
| 10 | 439 |
| 11 | 511 |
| 12 | 583 |
| 13 | 819 |
| 14 | 879 |
| 15 | 1023 |
| 16 | 1167 |
| 17 | 1443 |
| 18 | 1639 |
| 19 | 1747 |
| 20 | 1759 |
| 21 | 1915 |
| 22 | 2047 |
| 23 | 2115 |
| 24 | 2335 |
| 25 | 2887 |
| 26 | 3187 |
| 27 | 3279 |
| 28 | 3339 |
| 29 | 3495 |
| 30 | 3519 |
| 31 | 3831 |
| 32 | 4095 |
| 33 | 4231 |
| 34 | 4671 |
| 35 | 5043 |
| 36 | 5775 |
| 37 | 5995 |
| 38 | 6375 |
| 39 | 6559 |
| 40 | 6679 |
| 41 | 6991 |
| 42 | 7039 |
| 43 | 7323 |
| 44 | 7663 |
| 45 | 8191 |
| 46 | 8463 |
| 47 | 8931 |
| 48 | 9343 |
| 49 | 10087 |
| 50 | 10515 |
| 51 | 11551 |
| 52 | 11991 |
| 53 | 12531 |
| 54 | 12751 |
| 55 | 12827 |
| 56 | 13119 |
| 57 | 13359 |
| 58 | 13983 |
| 59 | 14079 |
| 60 | 14647 |
| 61 | 15327 |
| 62 | 16383 |