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A051813 Number of n-digit numbers with nonzero multiplicative digital root 2. 2

%I #4 Jun 11 2014 17:24:22

%S 1,15,208,2389,24845,243697,2348885,22837227,226507501,2285904554,

%T 23239957877,235731610792,2372897841904,23686630752065,

%U 235058927877399,2327977363798607

%N Number of n-digit numbers with nonzero multiplicative digital root 2.

%D William Mayne, sci.math, Jun 15 1991

%F # { i : 10^(n-1) < i < 10^n and A051802(i)=2 }

%Y Cf. A051802, A051804, A051822.

%K nonn,base,hard

%O 1,2

%A _Dan Hoey_, Dec 09 1999

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Last modified September 17 23:36 EDT 2024. Contains 375991 sequences. (Running on oeis4.)