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 | 8 |
| 2 | 152 |
| 3 | 5056 |
| 4 | 205720 |
| 5 | 9305152 |
| 6 | 449404224 |
| 7 | 22695553536 |
| 8 | 1183891745688 |
| 9 | 63293536425280 |
| 10 | 3449750940624064 |
| 11 | 190972642327080448 |
| 12 | 10708174630547469632 |
| 13 | 606900724292865506816 |
| 14 | 34711902088494315507200 |
| 15 | 2000990161185766676951040 |
| 16 | 116137589109102380308573080 |