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 | 1 |
| 2 | 4 |
| 3 | 11 |
| 4 | 25 |
| 5 | 52 |
| 6 | 103 |
| 7 | 198 |
| 8 | 374 |
| 9 | 699 |
| 10 | 1298 |
| 11 | 2401 |
| 12 | 4431 |
| 13 | 8166 |
| 14 | 15037 |
| 15 | 27676 |
| 16 | 50924 |
| 17 | 93685 |
| 18 | 172336 |
| 19 | 316999 |
| 20 | 583077 |
| 21 | 1072472 |
| 22 | 1972611 |
| 23 | 3628226 |
| 24 | 6673378 |
| 25 | 12274287 |
| 26 | 22575966 |
| 27 | 41523709 |
| 28 | 76374043 |
| 29 | 140473802 |
| 30 | 258371641 |
| 31 | 475219576 |
| 32 | 874065112 |
| 33 | 1607656425 |