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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 14 |
| 4 | 39 |
| 5 | 107 |
| 6 | 290 |
| 7 | 779 |
| 8 | 2079 |
| 9 | 5522 |
| 10 | 14615 |
| 11 | 38579 |
| 12 | 101634 |
| 13 | 267347 |
| 14 | 702455 |
| 15 | 1844114 |
| 16 | 4838079 |
| 17 | 12686507 |
| 18 | 33254210 |
| 19 | 87141659 |
| 20 | 228301839 |
| 21 | 598026002 |
| 22 | 1566300455 |
| 23 | 4101923939 |
| 24 | 10741568514 |
| 25 | 28126975907 |
| 26 | 73647747815 |
| 27 | 192833044754 |
| 28 | 504884940879 |
| 29 | 1321888886747 |