%I #5 Mar 30 2012 16:45:51
%S 0,2,3,6,9,19,24,46,62,96,132,194,249,354,452,600,762,986,1212,1544
%N Number of ferrites M_6Y_n that repeat after 6n+30 layers.
%D T. J. McLarnan, The numbers of polytypes ..., Zeits. Krist. 155, 269-291 (1981).
%K nonn,easy
%O 1,2
%A _N. J. A. Sloane_.