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A102258 Begin with 5, multiply each digit by 2. 0

%I #7 Mar 29 2015 16:31:49

%S 5,10,2,0,4,0,8,0,16,0,2,12,0,4,2,4,0,8,4,8,0,16,8,16,0,2,12,16,2,12,

%T 0,4,2,4,2,12,4,2,4,0,8,4,8,4,2,4,8,4,8,0,16,8,16,8,4,8,16,8,16,0,2,

%U 12,16,2,12,16,8,16,2,12,16,2,12,0,4,2,4,2,12,4,2,4,2,12,16,2,12,4,2,4,2,12,4

%N Begin with 5, multiply each digit by 2.

%F d*2, beginning with 5

%e Read a(2)=10 which produces a(3)=2 & a(4)=0 because 1*2=2 and 0*2=0

%e Now read a(3)=2 which produces [a(4) is already written] a(5)=4 because 2*2=4.

%t Flatten[ NestList[ Function[x, Flatten[FromDigits /@ 2IntegerDigits[x]]], 5, 15]] (* _Robert G. Wilson v_, Feb 21 2005 *)

%K base,easy,nonn

%O 1,1

%A _Alexandre Wajnberg_ and _Eric Angelini_, Feb 19 2005

%E More terms from _Robert G. Wilson v_, Feb 21 2005

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Last modified July 4 19:02 EDT 2024. Contains 374016 sequences. (Running on oeis4.)