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 | 0 |
| 2 | 4 |
| 3 | 18 |
| 4 | 44 |
| 5 | 100 |
| 6 | 180 |
| 7 | 294 |
| 8 | 432 |
| 9 | 630 |
| 10 | 900 |
| 11 | 1210 |
| 12 | 1548 |
| 13 | 2028 |
| 14 | 2548 |
| 15 | 3150 |
| 16 | 3744 |
| 17 | 4624 |
| 18 | 5436 |
| 19 | 6498 |
| 20 | 7500 |
| 21 | 8820 |
| 22 | 10164 |
| 23 | 11638 |
| 24 | 13104 |
| 25 | 14900 |
| 26 | 16900 |
| 27 | 18792 |
| 28 | 20972 |
| 29 | 23548 |
| 30 | 26100 |
| 31 | 28830 |
| 32 | 31360 |
| 33 | 34848 |
| 34 | 38148 |
| 35 | 41650 |
| 36 | 44676 |
| 37 | 49284 |
| 38 | 53428 |
| 39 | 57798 |
| 40 | 62000 |