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 | 0 |
| 1 | 1 |
| 2 | 0 |
| 3 | 3 |
| 4 | 5 |
| 5 | 3 |
| 6 | 18 |
| 7 | 3 |
| 8 | 52 |
| 9 | 3 |
| 10 | 141 |
| 11 | 3 |
| 12 | 374 |
| 13 | 3 |
| 14 | 984 |
| 15 | 3 |
| 16 | 2581 |
| 17 | 3 |
| 18 | 6762 |
| 19 | 3 |
| 20 | 17708 |
| 21 | 3 |
| 22 | 46365 |
| 23 | 3 |
| 24 | 121390 |
| 25 | 3 |
| 26 | 317808 |
| 27 | 3 |
| 28 | 832037 |
| 29 | 3 |
| 30 | 2178306 |
| 31 | 3 |
| 32 | 5702884 |
| 33 | 3 |
| 34 | 14930349 |
| 35 | 3 |
| 36 | 39088166 |
| 37 | 3 |
| 38 | 102334152 |
| 39 | 3 |
| 40 | 267914293 |
| 41 | 3 |
| 42 | 701408730 |
| 43 | 3 |
| 44 | 1836311900 |
| 45 | 3 |
| 46 | 4807526973 |
| 47 | 3 |
| 48 | 12586269022 |
| 49 | 3 |
| 50 | 32951280096 |
| 51 | 3 |
| 52 | 86267571269 |
| 53 | 3 |