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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 6 |
| 6 | 10 |
| 7 | 18 |
| 8 | 40 |
| 9 | 76 |
| 10 | 141 |
| 11 | 285 |
| 12 | 558 |
| 13 | 1066 |
| 14 | 2097 |
| 15 | 4121 |
| 16 | 8000 |
| 17 | 15660 |
| 18 | 30763 |
| 19 | 60171 |
| 20 | 117918 |
| 21 | 231690 |
| 22 | 454816 |
| 23 | 893208 |
| 24 | 1756688 |
| 25 | 3455580 |
| 26 | 6799195 |
| 27 | 13388587 |
| 28 | 26375466 |
| 29 | 51974798 |
| 30 | 102470402 |
| 31 | 202108730 |
| 32 | 398756664 |
| 33 | 787025260 |
| 34 | 1553900235 |
| 35 | 3068937675 |
| 36 | 6062944710 |
| 37 | 11981429394 |
| 38 | 23683822694 |
| 39 | 46828287038 |