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 | 2 |
| 3 | 6 |
| 4 | 60 |
| 5 | 6 |
| 6 | 420 |
| 7 | 6 |
| 8 | 4620 |
| 9 | 32760 |
| 10 | 30 |
| 11 | 471240 |
| 12 | 14820 |
| 13 | 42 |
| 14 | 15180 |
| 15 | 556920 |
| 16 | 15273720 |
| 17 | 30 |
| 18 | 11171160 |
| 19 | 164220 |
| 20 | 6 |
| 21 | 253333080 |
| 22 | 2460 |
| 23 | 587636280 |
| 24 | 625757605200 |
| 25 | 4620 |
| 26 | 102 |
| 27 | 289380 |
| 28 | 6 |
| 29 | 170940 |
| 30 | 26848135265397670224000 |
| 31 | 33540 |
| 32 | 599888520 |
| 33 | 138 |
| 34 | 39560762839197600 |
| 35 | 30 |