Search: id:A069248
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%I A069248
%S A069248 0,1,1,2,1,2,1,3,2,2,1,3,1,2,2,4,1,4,1,3,2,2,1,4,2,2,3,3,1,4,1,5,2,2,2,
%T A069248 6,1,2,2,4,1,4,1,3,3,2,1,5,2,4,2,3,1,6,2,4,2,2,1,6,1,2,3,6,2,4,1,3,2,4,
%U A069248 1,8,1,2,4,3,2,4,1,5,4,2,1,6,2,2,2,4,1,6,2,3,2,2,2,6,1,4,3,6
%N A069248 Number of positive divisors of n themselves divisible by largest prime 
               that divides n.
%H A069248 Leroy Quet, <a href="http://www.prism-of-spirals.net/">Home Page</a> 
               (listed in lieu of email address)
%F A069248 d(n) E_n/(E_n + 1), where d(n) is the number of positive divisors of 
               n and E_n is the exponent of the largest prime to divide n in the 
               prime factorization of n.
%e A069248 The divisors of 12 which are themselves divisible by 3 (the largest prime 
               dividing 12) are 3, 6 and 12. So the 12th term is 3.
%Y A069248 Sequence in context: A086436 A001222 A098893 this_sequence A008481 A127669 
               A056692
%Y A069248 Adjacent sequences: A069245 A069246 A069247 this_sequence A069249 A069250 
               A069251
%K A069248 nonn
%O A069248 1,4
%A A069248 Leroy Quet, Apr 08 2002

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