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 | 0 |
| 2 | 0 |
| 3 | 2 |
| 4 | 3 |
| 5 | 9 |
| 6 | 16 |
| 7 | 35 |
| 8 | 69 |
| 9 | 148 |
| 10 | 271 |
| 11 | 628 |
| 12 | 1167 |
| 13 | 2629 |
| 14 | 4830 |
| 15 | 10597 |
| 16 | 20083 |
| 17 | 42928 |
| 18 | 81579 |
| 19 | 174223 |
| 20 | 331314 |
| 21 | 701382 |
| 22 | 1340756 |
| 23 | 2825575 |
| 24 | 5422454 |
| 25 | 11361615 |
| 26 | 21873923 |
| 27 | 45673361 |
| 28 | 88161666 |
| 29 | 183458213 |
| 30 | 354899159 |
| 31 | 736343490 |
| 32 | 1427495050 |
| 33 | 2954560104 |