%I A135823
%S A135823 21,9261,21,9261,21,9261
%N A135823 Moves to permute (ufr,dfr)(ubr,ubl) corners in a 3 X 3 Rubik's cube.
%C A135823 r,l,u,d,f,b are respectively right, left, up, down, front, back faces 
               of a 3 X 3 Rubik's cube. Set M=2, R=3, L=5, U=7, D=11, F=13, B=17, 
               where M is 90 degree turn of the middle slice of Rubik's cube; R 
               is 90 degrees turn of the right face, L is 90 degree turn of the 
               left face... The moves to permute (ufr,dfr)(ubr,ubl) corners are: 
               (R*U)*(R^3*U^3)*(R*U)*(R^3*U^3)*(R*U)*(R^3*U^3)=(3*7)*(3^3*7^3)*(3*7)*(3^3*7^3)*(3*7)*(3^3*7^3)=21*9261*2\
               1*9261*21*9261; Note that as the order of 90 degrees turn T is 4, 
               then T^2=T^-2 and T^3=T^-1. Moves adapted from 'Adventure in group 
               theory', D. Joyner, J. Hopkins Press.
%e A135823 21 = 3*7 codes R*U moves
%Y A135823 Cf. A135819 A135820 A135823 A135824 A135825 A135826 A135827.
%Y A135823 Sequence in context: A055416 A074053 A028451 this_sequence A013726 A159358 
               A048914
%Y A135823 Adjacent sequences: A135820 A135821 A135822 this_sequence A135824 A135825 
               A135826
%K A135823 fini,full,nonn
%O A135823 0,1
%A A135823 Giorgio Balzarotti & Paolo P. Lava (greenblue(AT)tiscali.it), Nov 29 
               2007