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 | 16 |
| 3 | 132 |
| 4 | 504 |
| 5 | 1360 |
| 6 | 3000 |
| 7 | 5796 |
| 8 | 10192 |
| 9 | 16704 |
| 10 | 25920 |
| 11 | 38500 |
| 12 | 55176 |
| 13 | 76752 |
| 14 | 104104 |
| 15 | 138180 |
| 16 | 180000 |
| 17 | 230656 |
| 18 | 291312 |
| 19 | 363204 |
| 20 | 447640 |
| 21 | 546000 |
| 22 | 659736 |
| 23 | 790372 |
| 24 | 939504 |
| 25 | 1108800 |
| 26 | 1300000 |
| 27 | 1514916 |
| 28 | 1755432 |
| 29 | 2023504 |
| 30 | 2321160 |
| 31 | 2650500 |
| 32 | 3013696 |
| 33 | 3412992 |
| 34 | 3850704 |
| 35 | 4329220 |
| 36 | 4851000 |
| 37 | 5418576 |
| 38 | 6034552 |
| 39 | 6701604 |
| 40 | 7422480 |