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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 21 |
| 7 | 39 |
| 8 | 45 |
| 9 | 75 |
| 10 | 155 |
| 11 | 181 |
| 12 | 627 |
| 13 | 923 |
| 14 | 1241 |
| 15 | 2505 |
| 16 | 3915 |
| 17 | 5221 |
| 18 | 6475 |
| 19 | 11309 |
| 20 | 15595 |
| 21 | 19637 |
| 22 | 31595 |
| 23 | 44491 |
| 24 | 69451 |
| 25 | 113447 |
| 26 | 185269 |
| 27 | 244661 |
| 28 | 357081 |
| 29 | 453677 |
| 30 | 908091 |
| 31 | 980853 |
| 32 | 2960011 |
| 33 | 2965685 |
| 34 | 5931189 |
| 35 | 11862197 |
| 36 | 20437147 |
| 37 | 22193965 |
| 38 | 43586515 |
| 39 | 57804981 |
| 40 | 157355851 |