You gave it away with a slight error - the sequence is 0, 1, 2, 720...
For the curious, the sequence follows factorial (!) applied twice, i.e. (0!)!, (1!)! etc. (3!)! is 720, and (4!)! is 6.20448402 × 10^23.
For the curious, the sequence follows factorial (!) applied twice, i.e. (0!)!, (1!)! etc. (3!)! is 720, and (4!)! is 6.20448402 × 10^23.
i knew factorial but i had to read up on 0!, news to me too.
on another note, without context, we could say there is an infinite set of functions that satisfy any such question.
"what could come next and why" or something.
edit: 1 is indeed correct for the sequence, ignore that part... my bad.
0, 1!, (2!)!, ((3!)!)!, (((4!)!)!)!, ...