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%I A087550 #5 Dec 05 2013 19:56:31
%S A087550 3,7,9,13,13,19,27,49,49,49,49,49,49,49,81,81,81,81,81,81,81,81,81,
%T A087550 169,169,343,343,343,343,343,343,343,343,343,343,343,343,343,343,343,
%U A087550 343,343,343,343,343,343,343,361,361,361,361,361,361,361,361,361,361,361
%N A087550 a(n) = smallest k such that for each r, 2 <= r <= n, there exists a distinct s, n < s <= k, with the same prime signature as r.
%F A087550 For sufficiently large n, a(n) = 7^floor(log(n)/log(3)) because log(prime(2m))/log(prime(m)) is largest for m = 2. - _David Wasserman_, Jun 03 2005
%e A087550 a(7) = 19 and For numbers ( 2,3,4,5,6,7) we have the set of numbers ( 11,13,9,17,10,19) with matching prime signatures.
%K A087550 nonn
%O A087550 2,1
%A A087550 _Amarnath Murthy_, Sep 13 2003
%E A087550 More terms from _David Wasserman_, Jun 03 2005

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