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 | 8 |
| 3 | 163 |
| 4 | 6272 |
| 5 | 389581 |
| 6 | 35560448 |
| 7 | 4479975823 |
| 8 | 744707981312 |
| 9 | 157897753198201 |
| 10 | 41585725184933888 |
| 11 | 13318468253704790683 |
| 12 | 5097100004294081380352 |
| 13 | 2297277197389011910783621 |
| 14 | 1204339195916670860817072128 |
| 15 | 726625952070893090583192860743 |