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%I #13 May 20 2021 00:23:18
%S 0,1,1,1,1,2,1,2,2,2,2,3,2,3,3,3,3,4,3,4
%N Number of ferrites M_2Y_n that repeat after 6n+10 layers.
%H T. J. McLarnan, <a href="https://dx.doi.org/10.1524/zkri.1981.155.14.269">The numbers of polytypes in close-packings and related structures</a>, Zeits. Krist. 155, 269-291 (1981)
%K nonn,more
%O 1,6
%A _N. J. A. Sloane_