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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 10 |
| 6 | 22 |
| 7 | 47 |
| 8 | 98 |
| 9 | 199 |
| 10 | 396 |
| 11 | 777 |
| 12 | 1508 |
| 13 | 2900 |
| 14 | 5534 |
| 15 | 10492 |
| 16 | 19782 |
| 17 | 37119 |
| 18 | 69358 |
| 19 | 129118 |
| 20 | 239578 |
| 21 | 443229 |
| 22 | 817822 |
| 23 | 1505389 |
| 24 | 2764986 |
| 25 | 5068435 |
| 26 | 9273928 |
| 27 | 16940488 |
| 28 | 30897020 |
| 29 | 56271128 |
| 30 | 102347564 |
| 31 | 185922589 |
| 32 | 337353688 |
| 33 | 611462514 |