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 | 0 |
| 3 | 2 |
| 4 | 24 |
| 5 | 138 |
| 6 | 532 |
| 7 | 1596 |
| 8 | 4032 |
| 9 | 8988 |
| 10 | 18216 |
| 11 | 34254 |
| 12 | 60632 |
| 13 | 102102 |
| 14 | 164892 |
| 15 | 256984 |
| 16 | 388416 |
| 17 | 571608 |
| 18 | 821712 |
| 19 | 1156986 |
| 20 | 1599192 |
| 21 | 2174018 |
| 22 | 2911524 |
| 23 | 3846612 |
| 24 | 5019520 |
| 25 | 6476340 |
| 26 | 8269560 |
| 27 | 10458630 |
| 28 | 13110552 |
| 29 | 16300494 |
| 30 | 20112428 |
| 31 | 24639792 |
| 32 | 29986176 |
| 33 | 36266032 |
| 34 | 43605408 |
| 35 | 52142706 |