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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 7 |
| 11 | 14 |
| 12 | 22 |
| 13 | 31 |
| 14 | 41 |
| 15 | 103 |
| 16 | 235 |
| 17 | 457 |
| 18 | 791 |
| 19 | 1261 |
| 20 | 2399 |
| 21 | 5015 |
| 22 | 10257 |
| 23 | 19676 |
| 24 | 35296 |
| 25 | 65170 |
| 26 | 127520 |
| 27 | 256187 |
| 28 | 507601 |
| 29 | 969495 |
| 30 | 1834433 |
| 31 | 3534477 |
| 32 | 6962249 |
| 33 | 13809538 |
| 34 | 27061252 |
| 35 | 52439361 |
| 36 | 101701035 |
| 37 | 199152071 |
| 38 | 393332277 |
| 39 | 776589611 |
| 40 | 1525416837 |