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 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 9 |
| 5 | 19 |
| 6 | 37 |
| 7 | 76 |
| 8 | 159 |
| 9 | 326 |
| 10 | 671 |
| 11 | 1376 |
| 12 | 2815 |
| 13 | 5759 |
| 14 | 11774 |
| 15 | 24083 |
| 16 | 49249 |
| 17 | 100632 |
| 18 | 205490 |
| 19 | 419420 |
| 20 | 855799 |
| 21 | 1745889 |
| 22 | 3561867 |
| 23 | 7268240 |
| 24 | 14836127 |
| 25 | 30295633 |
| 26 | 61888616 |