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 | 0 |
| 6 | 1 |
| 7 | 7 |
| 8 | 28 |
| 9 | 84 |
| 10 | 210 |
| 11 | 462 |
| 12 | 925 |
| 13 | 1730 |
| 14 | 3108 |
| 15 | 5565 |
| 16 | 10388 |
| 17 | 20944 |
| 18 | 45697 |
| 19 | 104673 |
| 20 | 242481 |
| 21 | 553455 |
| 22 | 1229305 |
| 23 | 2650221 |
| 24 | 5565127 |
| 25 | 11465758 |
| 26 | 23397041 |
| 27 | 47757235 |
| 28 | 98317135 |
| 29 | 205108561 |
| 30 | 433747259 |
| 31 | 926655972 |
| 32 | 1989584722 |
| 33 | 4271185538 |
| 34 | 9133958765 |
| 35 | 19421679515 |