Search: id:A090174
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%I A090174
%S A090174 1,1,1,0,1,0,1,1,1,1,1,1,1,1,1,0,0,1,1,0,0,1,0,0,1,0,0,1,1,1,1,1,1,1,1,
%T A090174 1,0,1,1,1,1,1,1,1,0,1,1,1,1,1,1,1,1,1,1,1,1,0,1,1,1,1,1,0,1,1,0,0,0,0,
%U A090174 1,1,1,1,0,0,0,0,1,0,0,0,1,1,1,1,1,0,0,0,1,1,1,0,0,0,0,1,1,0,0,0,0,1,1
%N A090174 Triangle read by rows, related to Pascal's triangle read mod 2.
%D A090174 Y. Moshe, The density of 0's in recurrence double sequences, J Number 
               Theory, 103 (2003), 109-121; see Fig. 2.
%F A090174 a(n, k) = A091533(n, k) mod 2.
%e A090174 1; 1,1; 0,1,0; 1,1,1,1; 1,1,1,1,1; ...
%Y A090174 Row sums: A091564. Cf. A007318, A083093, A090171-A090173.
%Y A090174 Sequence in context: A139312 A071041 A140074 this_sequence A165556 A127243 
               A127248
%Y A090174 Adjacent sequences: A090171 A090172 A090173 this_sequence A090175 A090176 
               A090177
%K A090174 nonn,easy,tabl
%O A090174 0,1
%A A090174 N. J. A. Sloane (njas(AT)research.att.com), Jan 19 2004
%E A090174 Edited and extended by Christian G. Bower (bowerc(AT)usa.net), Jan 19 
               2004

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