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) |
|---|---|
| 8 | 105 |
| 9 | 1260 |
| 10 | 9450 |
| 11 | 56980 |
| 12 | 302995 |
| 13 | 1487200 |
| 14 | 6914908 |
| 15 | 30950920 |
| 16 | 134779645 |
| 17 | 575156036 |
| 18 | 2417578670 |
| 19 | 10046531276 |
| 20 | 41388056231 |
| 21 | 169371383384 |
| 22 | 689568172832 |
| 23 | 2796362035104 |
| 24 | 11305163394129 |
| 25 | 45595968007260 |
| 26 | 183557935474290 |
| 27 | 737897437077060 |
| 28 | 2963015460969915 |