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 | 0 |
| 2 | 1 |
| 3 | 8 |
| 4 | 30 |
| 5 | 80 |
| 6 | 180 |
| 7 | 336 |
| 8 | 620 |
| 9 | 960 |
| 10 | 1590 |
| 11 | 2200 |
| 12 | 3416 |
| 13 | 4368 |
| 14 | 6440 |
| 15 | 7920 |
| 16 | 11160 |
| 17 | 13056 |
| 18 | 18333 |
| 19 | 20520 |
| 20 | 27860 |
| 21 | 31360 |
| 22 | 41052 |
| 23 | 44528 |
| 24 | 59760 |
| 25 | 62400 |
| 26 | 80990 |
| 27 | 87120 |
| 28 | 109872 |
| 29 | 113680 |
| 30 | 147960 |
| 31 | 148800 |
| 32 | 188976 |
| 33 | 196416 |
| 34 | 240210 |
| 35 | 243040 |
| 36 | 311910 |
| 37 | 303696 |
| 38 | 376580 |
| 39 | 385840 |