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a(1) = 1, for n >= 2: a(n) = (a(n-1) - 1)^n.
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%I #12 Mar 13 2022 22:52:44

%S 1,0,-1,16,759375,191749544167774320464809980317709376

%N a(1) = 1, for n >= 2: a(n) = (a(n-1) - 1)^n.

%C a(7) has 247 digits and is too long to be displayed here.

%e For n = 4: a(4) = (-1 - 1)^4 = 16.

%t RecurrenceTable[{a[1]==1,a[n]==(a[n-1]-1)^n},a,{n,7}] (* _Harvey P. Dale_, Feb 17 2016 *)

%K sign

%O 1,4

%A _Jaroslav Krizek_, Nov 03 2010