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 | 4 |
| 3 | 18 |
| 4 | 92 |
| 5 | 230 |
| 6 | 522 |
| 7 | 1022 |
| 8 | 1808 |
| 9 | 2970 |
| 10 | 4610 |
| 11 | 6842 |
| 12 | 9792 |
| 13 | 13598 |
| 14 | 18410 |
| 15 | 24390 |
| 16 | 31712 |
| 17 | 40562 |
| 18 | 51138 |
| 19 | 63650 |
| 20 | 78320 |
| 21 | 95382 |
| 22 | 115082 |
| 23 | 137678 |
| 24 | 163440 |
| 25 | 192650 |
| 26 | 225602 |
| 27 | 262602 |
| 28 | 303968 |
| 29 | 350030 |
| 30 | 401130 |
| 31 | 457622 |
| 32 | 519872 |
| 33 | 588258 |
| 34 | 663170 |
| 35 | 745010 |
| 36 | 834192 |
| 37 | 931142 |
| 38 | 1036298 |
| 39 | 1150110 |