A220343 - cp's OEIS frontend

A220343 The number of decades below 10^n whose semiprime pattern is the same as semiprime pattern in the previous decade.

%I A220343 #6 Dec 12 2012 12:28:30
%S A220343 0,0,7,114,1794,24605
%N A220343 The number of decades below 10^n whose semiprime pattern is the same as semiprime pattern in the previous decade.
%e A220343 a(3) = 7 because the 7 values less than 10^3 are 104, 389, 435, 438, 529, 658, 884.
%Y A220343 Cf. A220063.
%K A220343 nonn,base
%O A220343 1,3
%A A220343 _Robert G. Wilson v_, _Jonathan Vos Post_, Dec 11 2012

cp's OEIS Frontend

A220343 The number of decades below 10^n whose semiprime pattern is the same as semiprime pattern in the previous decade.