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 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 21 |
| 7 | 0 |
| 8 | 1 |
| 9 | 51 |
| 10 | 282 |
| 11 | 0 |
| 12 | 1 |
| 13 | 93 |
| 14 | 1434 |
| 15 | 3070 |
| 16 | 0 |
| 17 | 1 |
| 18 | 147 |
| 19 | 4182 |
| 20 | 30410 |
| 21 | 29505 |
| 22 | 0 |
| 23 | 1 |
| 24 | 213 |
| 25 | 9762 |
| 26 | 136990 |
| 27 | 546465 |
| 28 | 260967 |
| 29 | 0 |
| 30 | 1 |
| 31 | 291 |
| 32 | 19110 |
| 33 | 467290 |
| 34 | 3784335 |
| 35 | 8815317 |
| 36 | 2175236 |
| 37 | 0 |
| 38 | 1 |
| 39 | 381 |
| 40 | 34602 |
| 41 | 1240310 |
| 42 | 18925485 |
| 43 | 94529631 |