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 | 1 |
| 2 | 6 |
| 3 | 81 |
| 4 | 1926 |
| 5 | 71766 |
| 6 | 3880476 |
| 7 | 287932581 |
| 8 | 28108272006 |
| 9 | 3494212490826 |
| 10 | 539028311478516 |
| 11 | 101049632261714826 |
| 12 | 22626867774953688156 |
| 13 | 5964834674702550872556 |
| 14 | 1828591301647701626873976 |
| 15 | 645038015434867327440540141 |
| 16 | 259424571204386832712110985926 |