%I A146086
%S A146086 3,11,45,197,903,4271,20625,100937,498123,2470931,12295605,61300877,
%T A146086 305972943,1528270391,7636568985,38168496017,190799433363,953868026651,
%U A146086 4768952712765,23843601302357,119214519727383,596062138283711
%N A146086 Number of n-digit numbers with each digit odd where the digits 1 and 
               3 occur an even number of times.
%F A146086 a(n)=(5^n+2*3^n+1)/4
%e A146086 For n=2 the a(2)=11 numbers are 11, 33, 55, 57, 59, 75, 77, 79, 95, 97, 
               99
%Y A146086 Sequence in context: A074532 A049186 A049160 this_sequence A049177 A080243 
               A001003
%Y A146086 Adjacent sequences: A146083 A146084 A146085 this_sequence A146087 A146088 
               A146089
%K A146086 base,easy,nonn
%O A146086 1,1
%A A146086 Jake Foster (jake.foster(AT)nau.edu), Oct 27 2008