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) |
|---|---|
| 9 | 1 |
| 10 | 0 |
| 11 | 0 |
| 12 | 9 |
| 13 | 0 |
| 14 | 9 |
| 15 | 36 |
| 16 | 9 |
| 17 | 81 |
| 18 | 93 |
| 19 | 108 |
| 20 | 333 |
| 21 | 270 |
| 22 | 585 |
| 23 | 945 |
| 24 | 1047 |
| 25 | 2016 |
| 26 | 2547 |
| 27 | 3612 |
| 28 | 5571 |
| 29 | 7101 |
| 30 | 10227 |
| 31 | 14256 |
| 32 | 18621 |
| 33 | 25830 |
| 34 | 34497 |
| 35 | 44955 |
| 36 | 60610 |
| 37 | 78480 |
| 38 | 101754 |
| 39 | 133092 |
| 40 | 169380 |
| 41 | 217008 |
| 42 | 276852 |
| 43 | 347967 |
| 44 | 439272 |
| 45 | 549786 |
| 46 | 683244 |
| 47 | 849528 |
| 48 | 1047678 |
| 49 | 1288017 |
| 50 | 1577934 |