%I A006948 M1255
%S A006948 1,2,4,12,30,88
%N A006948 Zero-entropy permutations of length n.
%D A006948 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%Y A006948 Sequence in context: A083554 A059412 A079472 this_sequence A148186 A148187 
               A148188
%Y A006948 Adjacent sequences: A006945 A006946 A006947 this_sequence A006949 A006950 
               A006951
%K A006948 nonn
%O A006948 1,2
%A A006948 Ethan Coven (ecoven(AT)wesleyan.edu)