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%I #9 Sep 14 2024 06:50:18
%S 6,11,14,22,23,27,30,38,43,46,47,54,55,59,62,70,75,78,86,87,91,94,95,
%T 102,107,110,111,118,119,123,126,134,139,142,150,151,155,158,166,171,
%U 174,175,182,183,187,190,191,198,203,206,214,215,219,222,223,230
%N Numbers m such that both m and m+1 have odd part of the form 4*k+3.
%C The asymptotic density of this sequence is 1/4. - _Amiram Eldar_, Sep 14 2024
%H Harvey P. Dale, <a href="/A106837/b106837.txt">Table of n, a(n) for n = 1..1000</a>
%e 30/2 = 15 == 3 (mod 4) and also 31 == 3 (mod 4), therefore 30 is in the sequence.
%t SequencePosition[Table[If[EvenQ[n],Mod[n/2^IntegerExponent[n,2],4], Mod[ n,4]],{n,250}],{3,3}][[All,1]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Nov 20 2016 *)
%Y Cf. A091067, A106838, A106840.
%Y Contains A106838 and A106838+1.
%K nonn
%O 1,1
%A _Ralf Stephan_, May 03 2005