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 | 2 |
| 4 | 6 |
| 5 | 13 |
| 6 | 31 |
| 7 | 67 |
| 8 | 148 |
| 9 | 315 |
| 10 | 672 |
| 11 | 1410 |
| 12 | 2951 |
| 13 | 6123 |
| 14 | 12663 |
| 15 | 26054 |
| 16 | 53449 |
| 17 | 109278 |
| 18 | 222890 |
| 19 | 453533 |
| 20 | 921107 |
| 21 | 1867427 |
| 22 | 3780396 |
| 23 | 7642719 |
| 24 | 15433236 |
| 25 | 31132582 |
| 26 | 62744943 |
| 27 | 126354087 |
| 28 | 254265823 |
| 29 | 511337918 |
| 30 | 1027733205 |
| 31 | 2064578674 |
| 32 | 4145578078 |
| 33 | 8320744045 |
| 34 | 16694805175 |