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%I #11 Mar 11 2021 23:52:17
%S 1,2,2,2,4,6,4,2,4,8,10,8,10,14,8,2,4,8,10,10,14,22,22,12,10,20,28,24,
%T 26,32,16,2,4,8,10,10,14,22,22,14,14,26,38,38,38,50,46,20,10,20,28,30,
%U 38,58,66,44,30,48,70,64,64,70,32,2,4,8
%N A161645(n)/3.
%D S. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215-224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962. See Example 3.
%Y Cf. A161644, A161645, A182634, A139250.
%K nonn
%O 2,2
%A _N. J. A. Sloane_, Mar 11 2021
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