Search: id:A078326
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%I A078326
%S A078326 9,289,676,9801,12168,465125
%N A078326 Squareful numbers of the form m*sfk(m)+1, where sfk=A007947 (square-free 
               kernel).
%C A078326 a(n) = u*sfk(u) = v*sfk(v)+1 for appropriate u, v.
%e A078326 9801 = 297*sfk(297) = 297*sfk(11*3^3) = 297*33 = A064549(297) = A064549(140)+1 
               = 140*sfk(140)+1 = 140*(7*5*2^2)+1 = 140*70+1 = 9800+1, therefore 
               9801 is a term.
%Y A078326 Cf. A078310, A064549, A078315, A078325.
%Y A078326 Sequence in context: A012141 A110553 A118893 this_sequence A055792 A053935 
               A086699
%Y A078326 Adjacent sequences: A078323 A078324 A078325 this_sequence A078327 A078328 
               A078329
%K A078326 nonn
%O A078326 1,1
%A A078326 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 23 2002

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