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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 10 |
| 6 | 24 |
| 7 | 44 |
| 8 | 116 |
| 9 | 236 |
| 10 | 468 |
| 11 | 908 |
| 12 | 1960 |
| 13 | 3776 |
| 14 | 7812 |
| 15 | 15876 |
| 16 | 32504 |
| 17 | 63744 |
| 18 | 130104 |
| 19 | 257592 |
| 20 | 521152 |
| 21 | 1042976 |
| 22 | 2087096 |
| 23 | 4166408 |
| 24 | 8376816 |
| 25 | 16760832 |
| 26 | 33507744 |
| 27 | 67089280 |
| 28 | 134169440 |
| 29 | 268236928 |
| 30 | 536759984 |
| 31 | 1073233840 |
| 32 | 2147384000 |
| 33 | 4294503744 |
| 34 | 8589075216 |
| 35 | 17179048048 |