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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 4 |
| 7 | 12 |
| 8 | 16 |
| 9 | 28 |
| 10 | 86 |
| 11 | 114 |
| 12 | 200 |
| 13 | 616 |
| 14 | 816 |
| 15 | 1432 |
| 16 | 4410 |
| 17 | 5842 |
| 18 | 10252 |
| 19 | 31572 |
| 20 | 41824 |
| 21 | 73396 |
| 22 | 226030 |
| 23 | 299426 |
| 24 | 525456 |
| 25 | 1618192 |
| 26 | 2143648 |
| 27 | 3761840 |
| 28 | 11584946 |
| 29 | 15346786 |
| 30 | 26931732 |
| 31 | 82938844 |
| 32 | 109870576 |
| 33 | 192809420 |
| 34 | 593775046 |
| 35 | 786584466 |
| 36 | 1380359512 |
| 37 | 4250949112 |