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 | 3 |
| 3 | 3 |
| 4 | 9 |
| 5 | 14 |
| 6 | 38 |
| 7 | 74 |
| 8 | 185 |
| 9 | 414 |
| 10 | 1025 |
| 11 | 2430 |
| 12 | 6012 |
| 13 | 14640 |
| 14 | 36294 |
| 15 | 89531 |
| 16 | 222452 |
| 17 | 552015 |
| 18 | 1374367 |
| 19 | 3421955 |
| 20 | 8535077 |
| 21 | 21296556 |
| 22 | 53184718 |
| 23 | 132846918 |
| 24 | 331913842 |
| 25 | 829176301 |
| 26 | 2071018243 |
| 27 | 5170617085 |
| 28 | 12902719975 |
| 29 | 32176288808 |