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) |
|---|---|
| 2 | 1 |
| 3 | 0 |
| 4 | 4 |
| 5 | 3 |
| 6 | 10 |
| 7 | 18 |
| 8 | 35 |
| 9 | 60 |
| 10 | 121 |
| 11 | 217 |
| 12 | 391 |
| 13 | 709 |
| 14 | 1281 |
| 15 | 2283 |
| 16 | 4061 |
| 17 | 7185 |
| 18 | 12680 |
| 19 | 22291 |
| 20 | 39051 |
| 21 | 68191 |
| 22 | 118767 |
| 23 | 206331 |
| 24 | 357596 |
| 25 | 618345 |
| 26 | 1066983 |
| 27 | 1837513 |
| 28 | 3158685 |
| 29 | 5420335 |
| 30 | 9286086 |
| 31 | 15884155 |
| 32 | 27130404 |
| 33 | 46274560 |
| 34 | 78822938 |
| 35 | 134095757 |
| 36 | 227853408 |
| 37 | 386721362 |
| 38 | 655639944 |