Search: id:A090163
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%I A090163
%S A090163 1,1,1,1,1,2,1,1,18
%N A090163 Triangle T(j,k) read by rows, where T(j,K)=number of different configurations 
               having the largest required number of moves S(j,k)=A090033(n) in 
               optimal solutions of the j X k generalization of Sam Loyd's sliding 
               block 15-puzzle, starting with the empty square in a corner.
%C A090163 T(k,j)=T(j,k). Extension: a(10)=T(4,4)>=13, a(11)=T(5,1)=1, a(12)=T(5,
               2)=2.
%H A090163 Hugo Pfoertner, <a href="http://www.randomwalk.de/sequences/sbpnx2.txt">
               Solutions of small n*2 sliding block puzzles.</a>
%e A090163 a(5)=T(3,2)=1 because the 3*2 sliding block puzzle has only one configuration 
               requiring the maximum solution path length A090033(5)=21.
%e A090163 A090034(21)=1, see link.
%Y A090163 For references, links and cross-references see A087725 and A090033.
%Y A090163 Sequence in context: A095836 A156697 A154991 this_sequence A124001 A157453 
               A156889
%Y A090163 Adjacent sequences: A090160 A090161 A090162 this_sequence A090164 A090165 
               A090166
%K A090163 hard,more,nonn,tabl
%O A090163 1,6
%A A090163 Hugo Pfoertner (hugo(AT)pfoertner.org), Nov 23 2003

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