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 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 8 |
| 8 | 17 |
| 9 | 37 |
| 10 | 85 |
| 11 | 196 |
| 12 | 469 |
| 13 | 1134 |
| 14 | 2799 |
| 15 | 6975 |
| 16 | 17628 |
| 17 | 44903 |
| 18 | 115497 |
| 19 | 299089 |
| 20 | 780036 |
| 21 | 2045924 |
| 22 | 5396078 |
| 23 | 14299878 |
| 24 | 38067356 |
| 25 | 101748748 |
| 26 | 272995157 |
| 27 | 735004112 |
| 28 | 1985356350 |
| 29 | 5378958683 |
| 30 | 14614641597 |
| 31 | 39813346977 |
| 32 | 108730631236 |
| 33 | 297641593852 |