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 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 8 |
| 14 | 156 |
| 15 | 1213 |
| 16 | 5232 |
| 17 | 16091 |
| 18 | 41834 |
| 19 | 100320 |
| 20 | 229851 |
| 21 | 513699 |
| 22 | 1166304 |
| 23 | 3068322 |
| 24 | 11294356 |
| 25 | 54431307 |
| 26 | 271824026 |
| 27 | 1253186445 |
| 28 | 5233138157 |
| 29 | 20031588131 |
| 30 | 71538367677 |
| 31 | 242280234545 |
| 32 | 789260222205 |
| 33 | 2507719402158 |
| 34 | 7900354628357 |