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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 11 |
| 7 | 23 |
| 8 | 45 |
| 9 | 95 |
| 10 | 195 |
| 11 | 417 |
| 12 | 875 |
| 13 | 1887 |
| 14 | 4021 |
| 15 | 8727 |
| 16 | 18755 |
| 17 | 40850 |
| 18 | 88366 |
| 19 | 192991 |
| 20 | 418994 |
| 21 | 916490 |
| 22 | 1995080 |
| 23 | 4367522 |
| 24 | 9521434 |
| 25 | 20849739 |
| 26 | 45493669 |