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a(n) = number of n-digit terms in A023086.
0

%I #2 Mar 30 2012 17:26:29

%S 1,0,0,0,0,12,288,4032,47904,398736,2668464

%N a(n) = number of n-digit terms in A023086.

%C 1. There are no terms in A023086 with number of digits in the range 2..5: a(2..5)=0, then a(6)=12, a(7)=288 etc.

%C 2. Minimal and maximal n-digit terms (n>=6) in A023086 are (10^(n-1)+25874) and (5*10^(n-1)-71429).

%Y A023086 n and 2*n are anagrams. A159816 Seven-digit terms in A023086.

%K base,nonn

%O 1,6

%A _Zak Seidov_, Apr 22 2009