%I A090165
%S A090165 1,3,6,14,32,66,134,280,585,1214,2462,4946,9861,19600,38688,76086,
%T A090165 148435
%N A090165 Number of configurations of Sam Loyd's sliding block 15-puzzle that require 
               a minimum of n moves to be reached, starting with the empty square 
               at one of the 8 non-corner boundary squares.
%o A090165 See link in A089473.
%Y A090165 Cf. A087725, A089473, A089484, A090164, A090378.
%Y A090165 Sequence in context: A106803 A006356 A077998 this_sequence A129954 A114945 
               A003477
%Y A090165 Adjacent sequences: A090162 A090163 A090164 this_sequence A090166 A090167 
               A090168
%K A090165 fini,more,nonn
%O A090165 0,2
%A A090165 Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 27 2003