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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 4 |
| 5 | 6 |
| 6 | 8 |
| 7 | 29 |
| 8 | 84 |
| 9 | 162 |
| 10 | 360 |
| 11 | 1074 |
| 12 | 2808 |
| 13 | 6444 |
| 14 | 16464 |
| 15 | 45629 |
| 16 | 118244 |
| 17 | 297450 |
| 18 | 790184 |
| 19 | 2138438 |
| 20 | 5624136 |
| 21 | 14778068 |
| 22 | 39767024 |
| 23 | 107287122 |
| 24 | 286593800 |
| 25 | 768920084 |
| 26 | 2083170960 |
| 27 | 5642886852 |
| 28 | 15250029552 |
| 29 | 41369986008 |
| 30 | 112681853344 |
| 31 | 306930498205 |
| 32 | 836259756612 |