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 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 0 |
| 8 | 2 |
| 9 | 4 |
| 10 | 0 |
| 11 | 0 |
| 12 | 19 |
| 13 | 29 |
| 14 | 0 |
| 15 | 0 |
| 16 | 127 |
| 17 | 208 |
| 18 | 0 |
| 19 | 0 |
| 20 | 1121 |
| 21 | 1917 |
| 22 | 0 |
| 23 | 0 |
| 24 | 10479 |
| 25 | 19360 |
| 26 | 0 |
| 27 | 0 |
| 28 | 113213 |
| 29 | 204121 |
| 30 | 0 |
| 31 | 0 |
| 32 | 1290968 |
| 33 | 2363982 |
| 34 | 0 |
| 35 | 0 |
| 36 | 15303057 |
| 37 | 28397538 |
| 38 | 0 |
| 39 | 0 |
| 40 | 187446097 |
| 41 | 351339307 |
| 42 | 0 |
| 43 | 0 |
| 44 | 2355979330 |
| 45 | 4455357992 |
| 46 | 0 |
| 47 | 0 |
| 48 | 30360404500 |
| 49 | 57630025172 |