%I A101440
%S A101440 1,2,4,8,16,32,64,128,256,512,5,10,20,40,80,160,320,640,1280,2560,9,18,
%T A101440 36,72,144,288,576,1152,2304,4608,17,34,68,136,272,544,1088,2176,4352,
%U A101440 8704,33,66,132,264,528,1056,2112,4224,8448,16896,65,130,260,520,1040
%N A101440 Replace each digit of n by 1 followed by n 0's: 0 -> 1, 1 -> 10, 2 -> 
               100, ..., 9 -> 1000000000, 10 -> 101, 11 -> 1010, 12 -> 10100, etc. 
               Expanded number is then converted from binary to decimal: 0 -> 1 
               -> 1, 1 -> 10 -> 2, 2 -> 100 -> 4, 9 -> 1000000000 -> 512, 10 -> 
               101 -> 5, etc.
%e A101440 a(123) = 328 : 123 -> 101001000 -> 328
%Y A101440 Sequence in context: A086066 A085941 A054842 this_sequence A126605 A072049 
               A072067
%Y A101440 Adjacent sequences: A101437 A101438 A101439 this_sequence A101441 A101442 
               A101443
%K A101440 base,easy,nonn
%O A101440 0,2
%A A101440 Felix Tubiana (fat2(AT)columbia.edu), Jan 18 2005