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%I #8 Jan 25 2022 21:49:40
%S 1,1,2,2,7,10,19,34,60,112,214,400,761,1450,2774,5341,10322,19992,
%T 38823,75551,147250,287503,562102,1100266,2155940,4228715,8301245,
%U 16309119,32064447,63082900,124181649,244597440,482026958,950392529
%N Number of positive integers <= 2^n of form x^2 + 11 y^2.
%Y Cf. A243651.
%K nonn
%O 0,3
%A _David W. Wilson_
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