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 | 20 |
| 4 | 64 |
| 5 | 132 |
| 6 | 224 |
| 7 | 340 |
| 8 | 480 |
| 9 | 644 |
| 10 | 832 |
| 11 | 1044 |
| 12 | 1280 |
| 13 | 1540 |
| 14 | 1824 |
| 15 | 2132 |
| 16 | 2464 |
| 17 | 2820 |
| 18 | 3200 |
| 19 | 3604 |
| 20 | 4032 |
| 21 | 4484 |
| 22 | 4960 |
| 23 | 5460 |
| 24 | 5984 |
| 25 | 6532 |
| 26 | 7104 |
| 27 | 7700 |
| 28 | 8320 |
| 29 | 8964 |
| 30 | 9632 |
| 31 | 10324 |
| 32 | 11040 |
| 33 | 11780 |
| 34 | 12544 |
| 35 | 13332 |
| 36 | 14144 |
| 37 | 14980 |
| 38 | 15840 |
| 39 | 16724 |
| 40 | 17632 |
| 41 | 18564 |
| 42 | 19520 |
| 43 | 20500 |