Search: id:A098780
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%I A098780
%S A098780 1,5,29,157,1437,13725,128413,1176989,20051357,355595677,6261175709,
%T A098780 109340390813,1896046785949,32682372363677,560447953696157,
%U A098780 95676472084371,49,315812421869630877,10692105963331253661
%N A098780 First n numbers in binary representation concatenated in reverse order.
%C A098780 a(n)=n*A000079(A070939(a(n-1)))+a(n-1); a(1) = 1.
%F A098780 a(n) = n*2^(1+floor[log2(a(n-1))]) + a(n-1); a(1) = 1.
%e A098780 a(4) = (4 3 2 1) -> (100 11 10 1) -> 10011101 -> 157.
%Y A098780 Cf. A047778, A007088.
%Y A098780 Sequence in context: A027864 A065541 A060926 this_sequence A146178 A015537 
               A141812
%Y A098780 Adjacent sequences: A098777 A098778 A098779 this_sequence A098781 A098782 
               A098783
%K A098780 nonn,base
%O A098780 1,2
%A A098780 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Oct 04 2004

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