

A245403


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


0



10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 20, 20, 20, 20, 20, 30, 30, 30, 40, 40, 50, 50, 60, 60, 70, 80, 90, 100, 110, 120, 130, 150, 160, 180, 200, 220, 250, 280, 310, 340, 380, 420, 470, 520, 580, 640, 710, 790, 880, 980, 1090, 1210, 1340, 1490, 1660
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OFFSET

1,1


LINKS

Table of n, a(n) for n=1..55.


FORMULA

a(n) = 10*A120202(n).


EXAMPLE

The numbers 1019 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.


PROG

(Sage)
A=[1]
for i in [1..60]:
A.append(ceil((109)/9*sum(A)))
[10*x for x in A]


CROSSREFS

Cf. A024664, A120202, A081848.
Sequence in context: A160941 A070565 A169932 * A091837 A316650 A216875
Adjacent sequences: A245400 A245401 A245402 * A245404 A245405 A245406


KEYWORD

nonn,base


AUTHOR

James Van Alstine, Jul 21 2014


STATUS

approved



