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 | 42 |
| 3 | 14 |
| 4 | 1 |
| 5 | 5544 |
| 6 | 3192 |
| 7 | 588 |
| 8 | 42 |
| 9 | 1 |
| 10 | 1507968 |
| 11 | 1165248 |
| 12 | 321552 |
| 13 | 41496 |
| 14 | 2688 |
| 15 | 84 |
| 16 | 1 |
| 17 | 696681216 |
| 18 | 655966080 |
| 19 | 232606080 |
| 20 | 41497344 |
| 21 | 4143552 |
| 22 | 240240 |
| 23 | 7980 |
| 24 | 140 |
| 25 | 1 |
| 26 | 489070213632 |
| 27 | 533531142144 |
| 28 | 226306918656 |
| 29 | 50249808000 |
| 30 | 6575950080 |