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 | 1 |
| 3 | 4 |
| 4 | 1 |
| 5 | 26 |
| 6 | 1 |
| 7 | 56 |
| 8 | 1 |
| 9 | 44 |
| 10 | 1 |
| 11 | 264 |
| 12 | 1 |
| 13 | 814 |
| 14 | 1 |
| 15 | 136 |
| 16 | 1 |
| 17 | 3730 |
| 18 | 1 |
| 19 | 20968 |
| 20 | 1 |
| 21 | 2448 |
| 22 | 1 |
| 23 | 287980 |
| 24 | 1 |
| 25 | 397238 |
| 26 | 1 |
| 27 | 2678 |
| 28 | 1 |
| 29 | 670896 |
| 30 | 1 |
| 31 | 8110044 |
| 32 | 1 |
| 33 | 20696 |
| 34 | 1 |
| 35 | 1066520 |
| 36 | 1 |
| 37 | 366601254 |
| 38 | 1 |
| 39 | 277444 |
| 40 | 1 |
| 41 | 5903828476 |
| 42 | 1 |
| 43 | 7701738148 |
| 44 | 1 |
| 45 | 8208058 |
| 46 | 1 |
| 47 | 30287795640 |
| 48 | 1 |
| 49 | 253244432640 |
| 50 | 1 |
| 51 | 11656644672 |
| 52 | 1 |
| 53 | 2376211301858 |
| 54 | 1 |
| 55 | 590009437260 |
| 56 | 1 |