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 | 0 |
| 3 | 0 |
| 4 | 48 |
| 5 | 600 |
| 6 | 3108 |
| 7 | 10388 |
| 8 | 27328 |
| 9 | 61668 |
| 10 | 124900 |
| 11 | 233288 |
| 12 | 409008 |
| 13 | 681408 |
| 14 | 1088388 |
| 15 | 1677900 |
| 16 | 2509568 |
| 17 | 3656428 |
| 18 | 5206788 |
| 19 | 7266208 |
| 20 | 9959600 |
| 21 | 13433448 |
| 22 | 17858148 |
| 23 | 23430468 |
| 24 | 30376128 |
| 25 | 38952500 |
| 26 | 49451428 |
| 27 | 62202168 |
| 28 | 77574448 |
| 29 | 95981648 |
| 30 | 117884100 |