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 | 3 |
| 3 | 11 |
| 4 | 34 |
| 5 | 144 |
| 6 | 165 |
| 7 | 229 |
| 8 | 517 |
| 9 | 790 |
| 10 | 6870 |
| 11 | 12757 |
| 12 | 21134 |
| 13 | 54155 |
| 14 | 226470 |
| 15 | 193225 |
| 16 | 431900 |
| 17 | 948949 |
| 18 | 3960994 |
| 19 | 6674779 |
| 20 | 7594013 |
| 21 | 14204939 |
| 22 | 32720909 |
| 23 | 20369309 |
| 24 | 176923605 |
| 25 | 335119938 |