cp's OEIS Frontend

A245403 Number of nonnegative integers with property that their base 10/9 expansion (see A024664) has n digits.

%I A245403 #11 Jul 22 2014 20:11:55
%S A245403 10,10,10,10,10,10,10,10,10,10,20,20,20,20,20,30,30,30,40,40,50,50,60,
%T A245403 60,70,80,90,100,110,120,130,150,160,180,200,220,250,280,310,340,380,
%U A245403 420,470,520,580,640,710,790,880,980,1090,1210,1340,1490,1660
%N A245403 Number of nonnegative integers with property that their base 10/9 expansion (see A024664) has n digits.
%F A245403 a(n) = 10*A120202(n).
%e A245403 The numbers 10-19 are represented by 90, 91, 92, 93, 94, 95, 96, 97, 98, 99 respectively in base 10/9. These are the only integers with two digits, and so a(2)=10.
%o A245403 (Sage)
%o A245403 A=[1]
%o A245403 for i in [1..60]:
%o A245403     A.append(ceil((10-9)/9*sum(A)))
%o A245403 [10*x for x in A]
%Y A245403 Cf. A024664, A120202, A081848.
%K A245403 nonn,base
%O A245403 1,1
%A A245403 _James Van Alstine_, Jul 21 2014