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) |
|---|---|
| 9 | 10 |
| 10 | 220 |
| 11 | 2002 |
| 12 | 11440 |
| 13 | 48620 |
| 14 | 167960 |
| 15 | 497420 |
| 16 | 1307504 |
| 17 | 3124550 |
| 18 | 6906900 |
| 19 | 14307150 |
| 20 | 28048800 |
| 21 | 52451256 |
| 22 | 94143280 |
| 23 | 163011640 |
| 24 | 273438880 |
| 25 | 445891810 |
| 26 | 708930508 |
| 27 | 1101716330 |
| 28 | 1677106640 |
| 29 | 2505433700 |
| 30 | 3679075400 |
| 31 | 5317936260 |
| 32 | 7575968400 |
| 33 | 10648873950 |
| 34 | 14783142660 |