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 | 1 |
| 2 | 4 |
| 3 | 18 |
| 4 | 32 |
| 5 | 160 |
| 6 | 324 |
| 7 | 1456 |
| 8 | 2048 |
| 9 | 13122 |
| 10 | 25600 |
| 11 | 117128 |
| 12 | 209952 |
| 13 | 913952 |
| 14 | 2119936 |
| 15 | 9447840 |
| 16 | 13107200 |
| 17 | 86093440 |
| 18 | 172186884 |
| 19 | 774840976 |
| 20 | 1310720000 |
| 21 | 6964002864 |
| 22 | 13718968384 |
| 23 | 62761410632 |
| 24 | 88159684608 |
| 25 | 557885504000 |
| 26 | 835308258304 |
| 27 | 5083731656658 |
| 28 | 8988257288192 |
| 29 | 45753584909920 |
| 30 | 89261680665600 |
| 31 | 411782264189296 |
| 32 | 564050001920000 |