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 | 0 |
| 4 | 20 |
| 5 | 164 |
| 6 | 616 |
| 7 | 1348 |
| 8 | 2352 |
| 9 | 3628 |
| 10 | 5176 |
| 11 | 6996 |
| 12 | 9088 |
| 13 | 11452 |
| 14 | 14088 |
| 15 | 16996 |
| 16 | 20176 |
| 17 | 23628 |
| 18 | 27352 |
| 19 | 31348 |
| 20 | 35616 |
| 21 | 40156 |
| 22 | 44968 |
| 23 | 50052 |
| 24 | 55408 |
| 25 | 61036 |
| 26 | 66936 |
| 27 | 73108 |
| 28 | 79552 |
| 29 | 86268 |
| 30 | 93256 |
| 31 | 100516 |
| 32 | 108048 |
| 33 | 115852 |
| 34 | 123928 |
| 35 | 132276 |
| 36 | 140896 |
| 37 | 149788 |
| 38 | 158952 |
| 39 | 168388 |
| 40 | 178096 |