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.
%I A092258 #5 Feb 18 2024 19:16:36
%S A092258 0,1,81,5764801,6568408355712890625,
%T A092258 529144398052420314716929933900838757437386767361
%N A092258 (2^n-1)^(2^n).
%C A092258 Number of maps from {0,1}^n to itself with no roots.
%D A092258 F. Robert, Discrete Iterations, Springer-Verlag, 1986, p. 167.
%t A092258 (#-1)^#&/@(2^Range[0,5]) (* _Harvey P. Dale_, Feb 18 2024 *)
%Y A092258 Cf. A057156, A091324.
%K A092258 nonn
%O A092258 0,3
%A A092258 _N. J. A. Sloane_, Feb 19 2004