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) |
|---|---|
| 4 | 1 |
| 5 | 2 |
| 6 | 6 |
| 7 | 16 |
| 8 | 43 |
| 9 | 113 |
| 10 | 300 |
| 11 | 787 |
| 12 | 2074 |
| 13 | 5460 |
| 14 | 14391 |
| 15 | 37960 |
| 16 | 100275 |
| 17 | 265187 |
| 18 | 702307 |
| 19 | 1862463 |
| 20 | 4945952 |
| 21 | 13152441 |
| 22 | 35023003 |
| 23 | 93385548 |
| 24 | 249330208 |
| 25 | 666539949 |
| 26 | 1784102735 |
| 27 | 4781254117 |
| 28 | 12828545419 |
| 29 | 34459732110 |
| 30 | 92668129050 |
| 31 | 249469906115 |
| 32 | 672296028786 |
| 33 | 1813606782459 |