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 | 4 |
| 2 | 13 |
| 3 | 33 |
| 4 | 75 |
| 5 | 141 |
| 6 | 219 |
| 7 | 321 |
| 8 | 435 |
| 9 | 665 |
| 10 | 897 |
| 11 | 1145 |
| 12 | 1515 |
| 13 | 1761 |
| 14 | 2019 |
| 15 | 2489 |
| 16 | 3125 |
| 17 | 3597 |
| 18 | 4085 |
| 19 | 4755 |
| 20 | 5181 |
| 21 | 5765 |
| 22 | 6555 |
| 23 | 7385 |
| 24 | 8631 |
| 25 | 9795 |
| 26 | 10401 |
| 27 | 11019 |
| 28 | 11661 |
| 29 | 12315 |
| 30 | 14349 |
| 31 | 16635 |
| 32 | 17945 |
| 33 | 19041 |
| 34 | 20709 |
| 35 | 22497 |
| 36 | 23705 |
| 37 | 25589 |
| 38 | 27219 |
| 39 | 28889 |
| 40 | 30965 |
| 41 | 32397 |