Search: id:A079128
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%I A079128
%S A079128 1,1,4,15,96,455,4320,29295,300160,2663199,36288000,348523175,
%T A079128 5748019200,68027248575,1116542242816,16813959537375,334764638208000,
%U A079128 4954072089341375,115242726703104000,1966765155600364119
%N A079128 Number of degree-n permutations with (mutually) relatively prime cycle 
               lengths.
%C A079128 a(p) = p!-(p-1)! for prime p. Conjecture: a(n) is divisible by n^2-1 
               for n>3.
%C A079128 Conjecture: gcd(a(n),n)=1. - Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 
               25 2003
%Y A079128 Cf. A079129, A000837.
%Y A079128 Sequence in context: A013193 A040025 A109365 this_sequence A081548 A009315 
               A027162
%Y A079128 Adjacent sequences: A079125 A079126 A079127 this_sequence A079129 A079130 
               A079131
%K A079128 nonn
%O A079128 1,3
%A A079128 Vladeta Jovovic, Vladimir Baltic (vladeta(AT)eunet.rs), Dec 27 2002

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