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) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 7 |
| 8 | 8 |
| 9 | 19 |
| 10 | 31 |
| 11 | 47 |
| 12 | 87 |
| 13 | 135 |
| 14 | 219 |
| 15 | 371 |
| 16 | 579 |
| 17 | 947 |
| 18 | 1535 |
| 19 | 2423 |
| 20 | 3919 |
| 21 | 6239 |
| 22 | 9891 |
| 23 | 15803 |
| 24 | 24987 |
| 25 | 39563 |
| 26 | 62663 |
| 27 | 98751 |
| 28 | 155815 |
| 29 | 245431 |
| 30 | 385771 |
| 31 | 606467 |
| 32 | 951795 |
| 33 | 1492323 |
| 34 | 2338703 |
| 35 | 3660551 |
| 36 | 5725951 |
| 37 | 8950543 |
| 38 | 13978931 |
| 39 | 21820235 |
| 40 | 34037067 |
| 41 | 53059643 |
| 42 | 82670167 |