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) |
|---|---|
| 5 | 1 |
| 6 | 2 |
| 7 | 4 |
| 8 | 8 |
| 9 | 15 |
| 10 | 28 |
| 11 | 51 |
| 12 | 92 |
| 13 | 165 |
| 14 | 294 |
| 15 | 522 |
| 16 | 924 |
| 17 | 1632 |
| 18 | 2878 |
| 19 | 5069 |
| 20 | 8920 |
| 21 | 15686 |
| 22 | 27570 |
| 23 | 48439 |
| 24 | 85080 |
| 25 | 149405 |
| 26 | 262320 |
| 27 | 460515 |
| 28 | 808380 |
| 29 | 1418916 |
| 30 | 2490432 |
| 31 | 4370944 |
| 32 | 7671188 |
| 33 | 13462945 |
| 34 | 23627078 |
| 35 | 41464296 |
| 36 | 72766972 |
| 37 | 127700055 |
| 38 | 224101844 |
| 39 | 393276447 |
| 40 | 690158844 |
| 41 | 1211153337 |