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A180258 a(n) = 2^(q*r) mod p for n-th odd number with exactly 3 distinct prime factors p<q<r. 1

%I #15 May 13 2013 01:54:11

%S 2,2,2,2,2,2,2,2,2,2,2,2,2,3,2,2,2,2,3,2,2,2,2,2,2,2,2,3,2,2,2,2,2,2,

%T 2,2,2,2,3,2,2,2,4,2,3,2,2,2,2,2,2,2,2,2,2,2,2,3,2,2,2,2,3,2,2,2,2,2,

%U 2,3,2,2,4,2,2,3,2,2,2,2,4,2,2,3,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2

%N a(n) = 2^(q*r) mod p for n-th odd number with exactly 3 distinct prime factors p<q<r.

%H Charles R Greathouse IV, <a href="/A180258/b180258.txt">Table of n, a(n) for n = 1..10000</a>

%e a(1) = (2^(5*7) mod 3) = 2, because A046389(1)=105=3*5*7 and 3<5<7.

%Y Cf. A046389, A180197, A180257.

%K nonn

%O 1,1

%A _Juri-Stepan Gerasimov_, Jan 17 2011

%E More terms and corrected a(28) from _Nathaniel Johnston_, Jan 18 2011

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Last modified April 16 11:48 EDT 2024. Contains 371711 sequences. (Running on oeis4.)