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A238746 Number of distinct prime signatures that occur among the divisors of the n-th prime signature number (A025487(n)). 2

%I

%S 1,2,3,3,4,5,5,7,4,6,6,9,7,7,9,11,10,8,12,9,13,5,10,13,9,15,14,15,9,

%T 14,16,10,18,19,17,13,18,10,19,11,16,21,12,15,24,19,17,22,16,22,12,23,

%U 24,6,19,20,29,21,21,26,22,25,13,30,27,11,26,25,19,34

%N Number of distinct prime signatures that occur among the divisors of the n-th prime signature number (A025487(n)).

%C Also the number of members of A025487 that divide A025487(n).

%H Amiram Eldar, <a href="/A238746/b238746.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = A085082(A025487(n)) = A085082(A181822(n)).

%e 5 members of A025487 divide A025487(6) = 12 (namely, 1, 2, 4, 6 and 12); therefore, a(6) = 5.

%Y Cf. A085082, A025487, A181822.

%Y Rearrangement of A115728, A115729 and A238690.

%Y A116473(n) is the number of times n appears in the sequence.

%K nonn

%O 1,2

%A _Matthew Vandermast_, Apr 28 2014

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Last modified July 10 15:45 EDT 2020. Contains 335577 sequences. (Running on oeis4.)