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) |
|---|---|
| 5 | 1 |
| 6 | 13 |
| 7 | 93 |
| 8 | 486 |
| 9 | 2080 |
| 10 | 7756 |
| 11 | 26193 |
| 12 | 82263 |
| 13 | 244906 |
| 14 | 701075 |
| 15 | 1950697 |
| 16 | 5318976 |
| 17 | 14300161 |
| 18 | 38078927 |
| 19 | 100753810 |
| 20 | 265490007 |
| 21 | 697759186 |
| 22 | 1830912101 |
| 23 | 4799663942 |
| 24 | 12574986625 |
| 25 | 32935310938 |
| 26 | 86245253339 |
| 27 | 225820609154 |