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A164378 a(n) = the smallest positive integer not yet in the sequence that is neither coprime to n nor to n+1. 2

%I #7 Mar 11 2014 01:32:45

%S 6,12,10,15,14,28,18,24,22,33,26,52,20,30,34,51,38,76,35,36,46,69,40,

%T 50,39,21,58,87,62,124,42,44,56,45,74,148,48,54,82,123,86,172,55,60,

%U 94,141,63,70,66,68,106,159,75,77,72,78,118,177,122,244,84,90,80,100,134,268

%N a(n) = the smallest positive integer not yet in the sequence that is neither coprime to n nor to n+1.

%C This is a permutation of sequence A024619, those positive integers that are not powers of primes.

%Y A164379, A164380, A024619

%K nonn

%O 2,1

%A _Leroy Quet_, Aug 14 2009

%E More terms from _Franklin T. Adams-Watters_, Aug 30 2009

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)