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 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 15 |
| 6 | 19 |
| 7 | 21 |
| 8 | 27 |
| 9 | 39 |
| 10 | 45 |
| 11 | 57 |
| 12 | 75 |
| 13 | 99 |
| 14 | 135 |
| 15 | 141 |
| 16 | 147 |
| 17 | 177 |
| 18 | 201 |
| 19 | 225 |
| 20 | 1865 |
| 21 | 1895 |
| 22 | 1905 |
| 23 | 1935 |
| 24 | 2045 |
| 25 | 2105 |
| 26 | 2255 |
| 27 | 2265 |
| 28 | 2285 |
| 29 | 2355 |
| 30 | 2475 |
| 31 | 2535 |
| 32 | 2945 |
| 33 | 2975 |
| 34 | 2985 |
| 35 | 3015 |
| 36 | 3305 |
| 37 | 3395 |
| 38 | 3415 |
| 39 | 3445 |
| 40 | 3515 |
| 41 | 3525 |
| 42 | 3575 |
| 43 | 3595 |
| 44 | 3645 |
| 45 | 3655 |
| 46 | 3735 |
| 47 | 3805 |
| 48 | 3825 |
| 49 | 3835 |