A102256 - OEIS

%I #7 Mar 29 2015 16:32:20

%S 1,2,4,8,1,6,2,1,2,4,2,4,8,4,8,1,6,8,1,6,2,1,2,1,6,2,1,2,4,2,4,2,1,2,

%T 4,2,4,8,4,8,4,2,4,8,4,8,1,6,8,1,6,8,4,8,1,6,8,1,6,2,1,2,1,6,2,1,2,1,

%U 6,8,1,6,2,1,2,1,6,2,1,2,4,2,4,2,1,2,4,2,4,2,1,2,1,6,2,1,2,4,2,4,2,1,2,4,2

%N Begin with 1, multiply each digit by 2, separate the digits.

%C Same digits as A061581 and A102251 but separating all digits.

%e Read a(4)=8 which produces, doing 8*2=16 ["1" & "6"], a(5)=1 & a(6)=6.

%e Now read a(5)=1 which produces [a(6) is already written] a(7)=2 because 1*2=2.

%e Now read a(6)=6 which produces [a(7) is already written] a(8)=1 & a(9)=2 because 6*2=12 ["1" & "2"].

%t Flatten[ NestList[ Function[x, Flatten[ IntegerDigits[ 2IntegerDigits[ x]]]], 1, 14]] (* _Robert G. Wilson v_, Feb 21 2005 *)

%Y Cf. A061581, A102251.

%K base,easy,nonn

%O 1,2

%A _Alexandre Wajnberg_ and _Eric Angelini_, Feb 19 2005

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