Search: id:A060845
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%I A060845
%S A060845 3,7,7,13,23,23,31,47,61,79,113,113,127,167,241,251,283,337,359,509,
%T A060845 523,619,727,839,953,1021,1327,1367,1669,1847,2039,2179,2179,2207,2399,
%U A060845 2803,3121,3469,3719,4093,4483,4909,5039,5323,6229,6553,6857,6883,7919
%N A060845 Largest prime < a nontrivial power of a prime.
%H A060845 Harry J. Smith, <a href="b060845.txt">Table of n, a(n) for n=1,...,1000</
               a>
%F A060845 a(n) = prevprime[A025475(n)] = A007917[A025475(n)] = Max{p| p<A025475(n)}
%e A060845 78125=5^7 follows 78121
%o A060845 (PARI) { m=1; for (n=1, 1000, m++; while(sigma(m)*eulerphi(m)*(1 - isprime(m)) 
               <= (m - 1)^2, m++); write("b060845.txt", n, " ", precprime(m - 1)); 
               ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 19 2009]
%Y A060845 Cf. A025475, A000961, A001597, A001694, A007917, A007918, A013632, A013633, 
               A049711, A060846.
%Y A060845 Sequence in context: A137315 A139795 A118259 this_sequence A060215 A059478 
               A081218
%Y A060845 Adjacent sequences: A060842 A060843 A060844 this_sequence A060846 A060847 
               A060848
%K A060845 nonn
%O A060845 1,1
%A A060845 Labos E. (labos(AT)ana.sote.hu), May 03 2001

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