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 | 1 |
| 3 | 2 |
| 4 | 2 |
| 5 | 3 |
| 6 | 4 |
| 7 | 5 |
| 8 | 6 |
| 9 | 8 |
| 10 | 26 |
| 11 | 81 |
| 12 | 243 |
| 13 | 693 |
| 14 | 1887 |
| 15 | 4932 |
| 16 | 12418 |
| 17 | 30288 |
| 18 | 72026 |
| 19 | 167989 |
| 20 | 541500 |
| 21 | 1635975 |
| 22 | 4662579 |
| 23 | 12580587 |
| 24 | 32228307 |
| 25 | 78662108 |
| 26 | 183988734 |
| 27 | 415466897 |
| 28 | 912816164 |
| 29 | 1965020012 |
| 30 | 6121555788 |
| 31 | 17573354640 |
| 32 | 46896718806 |