%I A090048
%S A090048 1,0,0,1,1,0,1,2,2,1,1,4,2,1,2,3,3,2,1,1,2,2,1,3,2,3,1,1,2,2,3,4,4,3,2,
%T A090048 2,2,1,2,4,2,1,4,2,1,6,4,3,3,2,2,2,3,2,2,6,3,2,1,1,2,3,4,5,5,4,3,3,2,2,
%U A090048 2,2,3,3,1,3,1,1,6,3,3,2,2,2,2,3,2,2,2,2,0,5,4,3,3,4,4,3,2,2,2,5
%N A090048 Length of longest contiguous block of 0's in binary expansion of n-th 
               triangular number.
%C A090048 a(n) = A087117(A000217(n)).
%Y A090048 Cf. A023416, A090047, A090049, A090002.
%Y A090048 Sequence in context: A046079 A165509 A100996 this_sequence A064285 A006694 
               A116595
%Y A090048 Adjacent sequences: A090045 A090046 A090047 this_sequence A090049 A090050 
               A090051
%K A090048 nonn,base
%O A090048 0,8
%A A090048 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 20 2003