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%I #2 Mar 30 2012 18:59:07
%S 1,1,3,3,7,5,13,9,19,13,29,17,41,23,49,31,65,37,83,45,95,55,117,63,
%T 137,75,155,87,183,95,213,111,233,127,257,139,293,157,317,173,357,185,
%U 399,205,423,227,469,243,511,263,543,287,595,305,635,329,671,357,729,373
%N Diagonal sums of Euler phi function sequence array.
%C Diagonal sums of A106476.
%F a(n)=sum{k=0..floor(n/2), phi(n-2k+1)}
%K easy,nonn
%O 0,3
%A _Paul Barry_, May 03 2005
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