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 | 2 |
| 3 | 18 |
| 4 | 64 |
| 5 | 186 |
| 6 | 380 |
| 7 | 838 |
| 8 | 1504 |
| 9 | 2242 |
| 10 | 4082 |
| 11 | 6266 |
| 12 | 8320 |
| 13 | 13010 |
| 14 | 17866 |
| 15 | 20218 |
| 16 | 31808 |
| 17 | 41390 |
| 18 | 50100 |
| 19 | 66530 |
| 20 | 82560 |
| 21 | 93446 |
| 22 | 123642 |
| 23 | 149398 |
| 24 | 171920 |
| 25 | 212166 |
| 26 | 249810 |
| 27 | 283678 |
| 28 | 340704 |
| 29 | 394882 |
| 30 | 428892 |
| 31 | 521406 |
| 32 | 594560 |
| 33 | 659382 |
| 34 | 764866 |
| 35 | 863154 |
| 36 | 954192 |
| 37 | 1086490 |
| 38 | 1212506 |
| 39 | 1326654 |
| 40 | 1498720 |
| 41 | 1660278 |