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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 7 |
| 5 | 8 |
| 6 | 15 |
| 7 | 24 |
| 8 | 60 |
| 9 | 168 |
| 10 | 480 |
| 11 | 1512 |
| 12 | 4800 |
| 13 | 15748 |
| 14 | 28672 |
| 15 | 65528 |
| 16 | 122880 |
| 17 | 393192 |
| 18 | 1098240 |
| 19 | 4124736 |
| 20 | 15605760 |
| 21 | 50328576 |
| 22 | 149873152 |
| 23 | 371226240 |
| 24 | 1710858240 |
| 25 | 7926750720 |
| 26 | 33463001088 |
| 27 | 109760857440 |
| 28 | 384120963072 |
| 29 | 1468475386560 |
| 30 | 7157589626880 |
| 31 | 33151875434496 |