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 | 72 |
| 5 | 388 |
| 6 | 904 |
| 7 | 1620 |
| 8 | 2536 |
| 9 | 3652 |
| 10 | 4968 |
| 11 | 6484 |
| 12 | 8200 |
| 13 | 10116 |
| 14 | 12232 |
| 15 | 14548 |
| 16 | 17064 |
| 17 | 19780 |
| 18 | 22696 |
| 19 | 25812 |
| 20 | 29128 |
| 21 | 32644 |
| 22 | 36360 |
| 23 | 40276 |
| 24 | 44392 |
| 25 | 48708 |
| 26 | 53224 |
| 27 | 57940 |
| 28 | 62856 |
| 29 | 67972 |
| 30 | 73288 |
| 31 | 78804 |
| 32 | 84520 |
| 33 | 90436 |
| 34 | 96552 |
| 35 | 102868 |
| 36 | 109384 |
| 37 | 116100 |
| 38 | 123016 |
| 39 | 130132 |