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%I #12 Jun 18 2018 05:36:47
%S 14,18,85,51,6,34,10,15,14,21,18,35,36,33,26,30,72,65,34,42,30,57,231,
%T 70,30,30,42,66,54,106,58,60,116,93,42,105,140,249,60,84,30,134,82,
%U 114,70,174,220,140,66,105,98,147,66,178,90,105,78,298,154,291,118,90,90
%N Smallest k such that usigma(n+k) = usigma(k).
%H Harry J. Smith, <a href="/A065343/b065343.txt">Table of n, a(n) for n = 1..1000</a>
%o (PARI) usigma(n)= { local(f,s=1); f=factor(n); for(i=1, matsize(f)[1], s*=1 + f[i, 1]^f[i, 2]); return(s) } { for (n=1, 1000, k=1; while (usigma(n + k) != usigma(k), k++); write("b065343.txt", n, " ", k) ) } \\ _Harry J. Smith_, Oct 16 2009
%Y Cf. A034448.
%K nonn
%O 1,1
%A _Jason Earls_, Dec 02 2001