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 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 7 |
| 7 | 23 |
| 8 | 46 |
| 9 | 113 |
| 10 | 287 |
| 11 | 680 |
| 12 | 1546 |
| 13 | 3374 |
| 14 | 7191 |
| 15 | 15008 |
| 16 | 30016 |
| 17 | 61013 |
| 18 | 124354 |
| 19 | 252577 |
| 20 | 511229 |
| 21 | 1031064 |
| 22 | 2074281 |
| 23 | 4164716 |
| 24 | 8350912 |
| 25 | 16729473 |
| 26 | 33494928 |
| 27 | 67034995 |
| 28 | 134127390 |
| 29 | 268325204 |
| 30 | 536737665 |
| 31 | 1073581062 |
| 32 | 2147162124 |
| 33 | 4294458549 |
| 34 | 8589210382 |
| 35 | 17178890873 |