A073030 - OEIS

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A073030

Sum_{k=1..n, gcd(n,k) = 1} 10^(k-1).

0

1, 11, 101, 1111, 10001, 111111, 1010101, 11011011, 101000101, 1111111111, 10001010001, 111111111111, 1010100010101, 11010011001011, 101010101010101, 1111111111111111, 10001010001010001, 111111111111111111

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OFFSET

2,2

COMMENTS

A054431 is concatenation of a(n).

LINKS

Table of n, a(n) for n=2..19.

CROSSREFS

Cf. A054431, A054432.

Sequence in context: A290111 A193707 A006943 * A290295 A209930 A203304

Adjacent sequences: A073027 A073028 A073029 * A073031 A073032 A073033

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Aug 15 2002

STATUS

approved