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A032940 Numbers whose base-5 representation Sum_{i=0..m} d(i)*5^(m-i) has d(i)=0 for all odd i.

%I A032940 #15 Feb 12 2021 22:03:12
%S A032940 1,2,3,4,5,10,15,20,25,26,27,28,29,50,51,52,53,54,75,76,77,78,79,100,
%T A032940 101,102,103,104,125,130,135,140,145,250,255,260,265,270,375,380,385,
%U A032940 390,395,500,505,510,515,520,625,626,627,628,629
%N A032940 Numbers whose base-5 representation Sum_{i=0..m} d(i)*5^(m-i) has d(i)=0 for all odd i.
%H A032940 Robert Israel, <a href="/A032940/b032940.txt">Table of n, a(n) for n = 1..10000</a>
%p A032940 f:= proc(n,j) local L,m;
%p A032940   L:= convert(n,base,5);
%p A032940   m:= nops(L);
%p A032940   j*add(L[i+1]*5^(2*i),i=0..m-1)
%p A032940 end proc:
%p A032940 seq(seq(seq(f(n,j),n=5^k..5^(k+1)-1),j=[1,5]),k=0..2); # _Robert Israel_, Nov 15 2020
%Y A032940 Cf. A007091 (numbers in base 5).
%K A032940 nonn,base
%O A032940 1,2
%A A032940 _Clark Kimberling_
%E A032940 Definition corrected by _Robert Israel_, Nov 15 2020