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) |
|---|---|
| 6 | 1 |
| 7 | 5 |
| 8 | 21 |
| 9 | 81 |
| 10 | 297 |
| 11 | 1052 |
| 12 | 3635 |
| 13 | 12333 |
| 14 | 41255 |
| 15 | 136449 |
| 16 | 447147 |
| 17 | 1454091 |
| 18 | 4697983 |
| 19 | 15094393 |
| 20 | 48264551 |
| 21 | 153678185 |
| 22 | 487510286 |
| 23 | 1541427097 |
| 24 | 4859385039 |
| 25 | 15278735029 |
| 26 | 47923821239 |
| 27 | 149992151725 |
| 28 | 468512665975 |
| 29 | 1460770946689 |
| 30 | 4546890238683 |
| 31 | 14131055304241 |
| 32 | 43854326838403 |