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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 6 |
| 8 | 13 |
| 9 | 26 |
| 10 | 56 |
| 11 | 122 |
| 12 | 278 |
| 13 | 634 |
| 14 | 1494 |
| 15 | 3540 |
| 16 | 8542 |
| 17 | 20774 |
| 18 | 51116 |
| 19 | 126648 |
| 20 | 316452 |
| 21 | 795510 |
| 22 | 2012476 |
| 23 | 5117613 |
| 24 | 13079677 |
| 25 | 33576706 |
| 26 | 86555074 |
| 27 | 223965633 |
| 28 | 581573118 |
| 29 | 1515084771 |
| 30 | 3959038337 |
| 31 | 10374543765 |
| 32 | 27258298145 |