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 | 0 |
| 4 | 1 |
| 5 | 2 |
| 6 | 0 |
| 7 | 0 |
| 8 | 6 |
| 9 | 11 |
| 10 | 0 |
| 11 | 0 |
| 12 | 57 |
| 13 | 103 |
| 14 | 0 |
| 15 | 0 |
| 16 | 615 |
| 17 | 1131 |
| 18 | 0 |
| 19 | 0 |
| 20 | 7209 |
| 21 | 13467 |
| 22 | 0 |
| 23 | 0 |
| 24 | 89261 |
| 25 | 168515 |
| 26 | 0 |
| 27 | 0 |
| 28 | 1147893 |
| 29 | 2183943 |
| 30 | 0 |
| 31 | 0 |
| 32 | 15181540 |
| 33 | 29055149 |
| 34 | 0 |
| 35 | 0 |
| 36 | 205171534 |
| 37 | 394497990 |
| 38 | 0 |
| 39 | 0 |
| 40 | 2820847321 |
| 41 | 5444272739 |
| 42 | 0 |
| 43 | 0 |
| 44 | 39329485312 |
| 45 | 76142226498 |
| 46 | 0 |
| 47 | 0 |
| 48 | 554756557011 |