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) |
|---|---|
| 0 | 1 |
| 1 | 46 |
| 2 | 2116 |
| 3 | 97336 |
| 4 | 4477456 |
| 5 | 205962976 |
| 6 | 9474296896 |
| 7 | 435817657216 |
| 8 | 20047612231936 |
| 9 | 922190162669056 |
| 10 | 42420747482776576 |
| 11 | 1951354384207722496 |
| 12 | 89762301673555234816 |
| 13 | 4129065876983540801536 |
| 14 | 189937030341242876870656 |
| 15 | 8737103395697172336050176 |
| 16 | 401906756202069927458308096 |