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 | 2 |
| 4 | 0 |
| 5 | 4 |
| 6 | 6 |
| 7 | 6 |
| 8 | 24 |
| 9 | 28 |
| 10 | 60 |
| 11 | 130 |
| 12 | 190 |
| 13 | 432 |
| 14 | 770 |
| 15 | 1386 |
| 16 | 2856 |
| 17 | 5056 |
| 18 | 9828 |
| 19 | 18918 |
| 20 | 34908 |
| 21 | 68132 |
| 22 | 128502 |
| 23 | 244090 |
| 24 | 470646 |
| 25 | 890628 |
| 26 | 1709136 |
| 27 | 3271866 |
| 28 | 6238986 |
| 29 | 11986288 |
| 30 | 22925630 |
| 31 | 43932906 |
| 32 | 84349336 |
| 33 | 161625288 |
| 34 | 310404768 |
| 35 | 596009494 |