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A191476 Values of j of the numbers 2^i*3^j (A033845). 5

%I #15 Nov 01 2013 03:31:42

%S 1,1,2,1,2,1,3,2,1,3,2,4,1,3,2,4,1,3,5,2,4,1,3,5,2,4,6,1,3,5,2,4,6,1,

%T 3,5,7,2,4,6,1,3,5,7,2,4,6,1,8,3,5,7,2,4,6,1,8,3,5,7,2,9,4,6,1,8,3,5,

%U 7,2,9,4,6,1,8,3,10,5,7,2,9,4,6,1,8,3

%N Values of j of the numbers 2^i*3^j (A033845).

%C Not the same as A134583.

%H Zak Seidov, <a href="/A191476/b191476.txt">Table of n, a(n) for n = 1..10000</a>

%e a(10) = 3 because A033845(10) = 108 = 2^2*3^3.

%e a(100) = 7 because A033845(100) = 59872 = 2^8*3^7.

%e a(1000) = 1 because A033845(1000) = 216172782113783808 = 2^56*3^1.

%t mx = 1000000; t = Select[Sort[Flatten[Table[2^i 3^j, {i, Log[2, mx]}, {j, Log[3, mx]}]]], # <= mx &]; Table[FactorInteger[i][[2, 2]], {i, t}] (* _T. D. Noe_, Aug 31 2012 *)

%Y Cf. A033845 (numbers 2^i*3^j), A191475 (values of i), A134583.

%K nonn

%O 1,3

%A _Zak Seidov_, Aug 30 2012

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Last modified April 24 03:08 EDT 2024. Contains 371918 sequences. (Running on oeis4.)