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 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 8 |
| 6 | 18 |
| 7 | 37 |
| 8 | 84 |
| 9 | 180 |
| 10 | 413 |
| 11 | 902 |
| 12 | 2084 |
| 13 | 4628 |
| 14 | 10726 |
| 15 | 24128 |
| 16 | 56085 |
| 17 | 127421 |
| 18 | 296955 |
| 19 | 680092 |
| 20 | 1588665 |
| 21 | 3662439 |
| 22 | 8574262 |
| 23 | 19875081 |
| 24 | 46628789 |
| 25 | 108584460 |
| 26 | 255264307 |
| 27 | 596774173 |
| 28 | 1405626896 |
| 29 | 3297314994 |
| 30 | 7780687159 |
| 31 | 18305763571 |
| 32 | 43271547808 |
| 33 | 102069399803 |