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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 5 |
| 7 | 0 |
| 8 | 1 |
| 9 | 13 |
| 10 | 73 |
| 11 | 0 |
| 12 | 1 |
| 13 | 29 |
| 14 | 301 |
| 15 | 2069 |
| 16 | 0 |
| 17 | 1 |
| 18 | 61 |
| 19 | 1081 |
| 20 | 11581 |
| 21 | 95401 |
| 22 | 0 |
| 23 | 1 |
| 24 | 125 |
| 25 | 3613 |
| 26 | 57749 |
| 27 | 673261 |
| 28 | 6487445 |
| 29 | 0 |
| 30 | 1 |
| 31 | 253 |
| 32 | 11593 |
| 33 | 268381 |
| 34 | 4306681 |
| 35 | 55213453 |
| 36 | 610093513 |
| 37 | 0 |
| 38 | 1 |
| 39 | 509 |
| 40 | 36301 |
| 41 | 1191989 |
| 42 | 25794781 |
| 43 | 431525429 |
| 44 | 6077248381 |
| 45 | 75796724309 |
| 46 | 0 |
| 47 | 1 |
| 48 | 1021 |
| 49 | 111961 |
| 50 | 5136061 |
| 51 | 147587401 |
| 52 | 3173843821 |
| 53 | 56153444761 |
| 54 | 864806272861 |
| 55 | 12020754177001 |