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 | 10 |
| 2 | 100 |
| 3 | 240 |
| 4 | 576 |
| 5 | 1872 |
| 6 | 6084 |
| 7 | 18096 |
| 8 | 53824 |
| 9 | 165648 |
| 10 | 509796 |
| 11 | 1542240 |
| 12 | 4665600 |
| 13 | 14251680 |
| 14 | 43533604 |
| 15 | 132223920 |
| 16 | 401601600 |
| 17 | 1223922960 |
| 18 | 3730033476 |
| 19 | 11344617648 |
| 20 | 34503805504 |
| 21 | 105068389776 |
| 22 | 319946347044 |
| 23 | 973567075392 |
| 24 | 2962474361856 |