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) |
|---|---|
| 0 | 0 |
| 1 | 4 |
| 2 | 20 |
| 3 | 56 |
| 4 | 120 |
| 5 | 220 |
| 6 | 364 |
| 7 | 560 |
| 8 | 816 |
| 9 | 1140 |
| 10 | 1540 |
| 11 | 2024 |
| 12 | 2600 |
| 13 | 3276 |
| 14 | 4060 |
| 15 | 4960 |
| 16 | 5984 |
| 17 | 7140 |
| 18 | 8436 |
| 19 | 9880 |
| 20 | 11480 |
| 21 | 13244 |
| 22 | 15180 |
| 23 | 17296 |
| 24 | 19600 |
| 25 | 22100 |
| 26 | 24804 |
| 27 | 27720 |
| 28 | 30856 |
| 29 | 34220 |
| 30 | 37820 |
| 31 | 41664 |
| 32 | 45760 |
| 33 | 50116 |
| 34 | 54740 |
| 35 | 59640 |
| 36 | 64824 |
| 37 | 70300 |
| 38 | 76076 |
| 39 | 82160 |