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) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 0 |
| 6 | 1 |
| 7 | 4 |
| 8 | 4 |
| 9 | 1 |
| 10 | 14 |
| 11 | 12 |
| 12 | 17 |
| 13 | 32 |
| 14 | 64 |
| 15 | 81 |
| 16 | 138 |
| 17 | 272 |
| 18 | 489 |
| 19 | 764 |
| 20 | 1548 |
| 21 | 2809 |
| 22 | 5062 |
| 23 | 9420 |
| 24 | 17721 |
| 25 | 32712 |
| 26 | 60992 |
| 27 | 114105 |
| 28 | 213890 |
| 29 | 398784 |
| 30 | 747745 |
| 31 | 1401476 |
| 32 | 2624004 |
| 33 | 4916369 |
| 34 | 9218118 |
| 35 | 17274340 |
| 36 | 32378521 |
| 37 | 60694768 |
| 38 | 113785984 |
| 39 | 213293721 |
| 40 | 399856922 |
| 41 | 749628208 |