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 | 21 |
| 2 | 1563 |
| 3 | 162409 |
| 4 | 17508475 |
| 5 | 1894621633 |
| 6 | 205109410835 |
| 7 | 22206188455913 |
| 8 | 2404176415007051 |
| 9 | 260291084969169553 |
| 10 | 28180738494571199683 |
| 11 | 3051022897700513626745 |
| 12 | 330322812747235906893563 |
| 13 | 35762812820215620676404385 |
| 14 | 3871905699058282397207463923 |