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A160820 a(1)=2. For n >=2, a(n) = smallest positive integer > a(n-1) such that Omega(a(n)) = Omega(a(n)-a(n-1)), where Omega(m) = A001222(m). 3

%I

%S 2,5,7,21,23,33,39,41,43,49,55,63,69,71,73,77,79,85,91,95,97,105,107,

%T 109,115,119,123,129,131,141,145,153,159,169,178,181,185,194,197,199,

%U 203,209,211,215,219,231,233,237,239,241,247,253,259,265,273,285,289

%N a(1)=2. For n >=2, a(n) = smallest positive integer > a(n-1) such that Omega(a(n)) = Omega(a(n)-a(n-1)), where Omega(m) = A001222(m).

%C For n>=2, a(n)-a(n-1) = A160819(n).

%H H. v. Eitzen, <a href="/A160820/b160820.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A001222, A160819, A160822.

%K nonn

%O 1,1

%A _Leroy Quet_, May 27 2009

%E Extended by _Ray Chandler_, Jun 15 2009

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Last modified October 17 21:17 EDT 2021. Contains 348065 sequences. (Running on oeis4.)