%I A025472
%S A025472 1,6,24,87,393,2002,11212,65907,398221,2454882
%N A025472 a(n) = position of 7^n among the powers of primes (A000961).
%Y A025472 Sequence in context: A166060 A124807 A121532 this_sequence A002919 A006780 
               A001352
%Y A025472 Adjacent sequences: A025469 A025470 A025471 this_sequence A025473 A025474 
               A025475
%K A025472 nonn
%O A025472 0,2
%A A025472 Clark Kimberling (ck6(AT)evansville.edu)