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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 7 |
| 5 | 14 |
| 6 | 28 |
| 7 | 51 |
| 8 | 91 |
| 9 | 156 |
| 10 | 260 |
| 11 | 425 |
| 12 | 680 |
| 13 | 1068 |
| 14 | 1654 |
| 15 | 2524 |
| 16 | 3802 |
| 17 | 5668 |
| 18 | 8350 |
| 19 | 12190 |
| 20 | 17634 |
| 21 | 25306 |
| 22 | 36011 |
| 23 | 50902 |
| 24 | 71441 |
| 25 | 99642 |