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 | 0 |
| 5 | 4 |
| 6 | 8 |
| 7 | 32 |
| 8 | 64 |
| 9 | 160 |
| 10 | 320 |
| 11 | 640 |
| 12 | 1280 |
| 13 | 2240 |
| 14 | 4480 |
| 15 | 7168 |
| 16 | 14336 |
| 17 | 21504 |
| 18 | 43008 |
| 19 | 61440 |
| 20 | 122880 |
| 21 | 168960 |
| 22 | 337920 |
| 23 | 450560 |
| 24 | 901120 |
| 25 | 1171456 |
| 26 | 2342912 |
| 27 | 2981888 |
| 28 | 5963776 |
| 29 | 7454720 |
| 30 | 14909440 |
| 31 | 18350080 |
| 32 | 36700160 |
| 33 | 44564480 |
| 34 | 89128960 |
| 35 | 106954752 |
| 36 | 213909504 |
| 37 | 254017536 |
| 38 | 508035072 |
| 39 | 597688320 |