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 | 2 |
| 2 | 8 |
| 3 | 88 |
| 4 | 384 |
| 5 | 1056 |
| 6 | 2310 |
| 7 | 207936 |
| 8 | 417219 |
| 9 | 2978610 |
| 10 | 6215400 |
| 11 | 9216124 |
| 12 | 205006774 |
| 13 | 255230655 |
| 14 | 576178034 |
| 15 | 1157525280 |
| 16 | 2038109955 |
| 17 | 3053762208 |
| 18 | 10584038058 |
| 19 | 25042362120 |
| 20 | 1025402527504 |
| 21 | 2304427934330 |
| 22 | 11623068703428 |