Search: id:A063968
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%I A063968
%S A063968 2,340,845,950,1340,3724,5694,6102,7657,8991,9331,9709,10323,11388,
%T A063968 11390,12460,15870,18912,19778,20882,21715,24732,26978,29052,29632,
%U A063968 32428,33596,35028,38178,42718,43068,45750,46102,50396,53251,61408
%N A063968 sopf(n) = sopf(n+2), where sopf(n)= A008472(n).
%H A063968 Harry J. Smith, <a href="b063968.txt">Table of n, a(n) for n=1,...,1000</
               a>
%o A063968 (PARI) sopf(n,s,fac,i)=fac=factor(n); for(i=1,matsize(fac)[1],s=s+fac[i,
               1]); return(s); j=[]; for(n=1,100000, if(sopf(n)==sopf(n+2),j=concat(j,
               n))); j
%o A063968 (PARI) sopf(n)= { local(f,s=0); f=factor(n); for(i=1, matsize(f)[1], 
               s+=f[i, 1]); return(s) } { n=0; r=sopf(1); s=sopf(2); for (m=1, 10^9, 
               t=sopf(m + 2); if(r==t, write("b063968.txt", n++, " ", m); if (n==1000, 
               break)); r=s; s=t ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), 
               Sep 04 2009]
%Y A063968 Cf. A008472, A006145.
%Y A063968 Sequence in context: A159488 A083863 A057626 this_sequence A064501 A063831 
               A064023
%Y A063968 Adjacent sequences: A063965 A063966 A063967 this_sequence A063969 A063970 
               A063971
%K A063968 nonn
%O A063968 1,1
%A A063968 Jason Earls (zevi_35711(AT)yahoo.com), Sep 05 2001

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