%I A001256
%S A001256 1,1,1,1,4,9,36,121,529,2209,11236,55225,303601,1692601,
%T A001256 9979281,59923081,373262400,2364779641,15343033689,101095382025,
%U A001256 677435994225,4598901695025,31626631547536,219871778549476
%N A001256 Squares of numbers of trees.
%H A001256 <a href="Sindx_Tra.html#trees">Index entries for sequences related to 
               trees</a>
%Y A001256 Cf. A000055.
%Y A001256 Sequence in context: A149143 A149144 A149145 this_sequence A029997 A118548 
               A077211
%Y A001256 Adjacent sequences: A001253 A001254 A001255 this_sequence A001257 A001258 
               A001259
%K A001256 nonn
%O A001256 0,5
%A A001256 N. J. A. Sloane (njas(AT)research.att.com).