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 | 3 |
| 4 | 1 |
| 5 | 15 |
| 6 | 6 |
| 7 | 105 |
| 8 | 6 |
| 9 | 35 |
| 10 | 60 |
| 11 | 385 |
| 12 | 90 |
| 13 | 5005 |
| 14 | 1260 |
| 15 | 75075 |
| 16 | 315 |
| 17 | 1276275 |
| 18 | 210 |
| 19 | 24249225 |
| 20 | 525 |
| 21 | 509233725 |
| 22 | 11550 |
| 23 | 11712375675 |
| 24 | 34650 |
| 25 | 2342475135 |
| 26 | 900900 |
| 27 | 2342475135 |
| 28 | 3153150 |
| 29 | 67931778915 |
| 30 | 28028 |
| 31 | 2105885146365 |
| 32 | 14014 |
| 33 | 2573859623335 |