%I A006921 M2252
%S A006921 1,1,3,2,7,5,13,8,29,21,55,34,115,81,209,128,465,337,883,546,1847,1301,
%T A006921 3357,2056,7437,5381,14087,8706,29443,20737,53505,32768,119041,86273,
%U A006921 226051,139778,472839,333061,859405,526344,1903901,1377557,3606327
%N A006921 Diagonals of Pascal's triangle mod 2 interpreted as binary numbers.
%D A006921 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006921 B. R. Hodgson, On some number sequences related to the parity of binomial 
               coefficients, Fib. Quart., 30 (1992), 35-47.
%Y A006921 Sequence in context: A069888 A073281 A130922 this_sequence A014693 A155046 
               A033318
%Y A006921 Adjacent sequences: A006918 A006919 A006920 this_sequence A006922 A006923 
               A006924
%K A006921 nonn,easy
%O A006921 0,3
%A A006921 N. J. A. Sloane (njas(AT)research.att.com).