Search: id:A063987
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%I A063987
%S A063987 1,1,1,4,1,2,4,1,3,4,5,9,1,3,4,9,10,12,1,2,4,8,9,13,15,16,1,4,5,6,7,9,
%T A063987 11,16,17,1,2,3,4,6,8,9,12,13,16,18,1,4,5,6,7,9,13,16,20,22,23,24,25,
%U A063987 28,1,2,4,5,7,8,9,10,14,16,18,19,20,25,28,1,3,4,7,9,10,11,12,16,21,25
%N A063987 Triangle in which n-th row gives quadratic residues modulo the n-th prime.
%H A063987 T. D. Noe, <a href="b063987.txt">Rows n=1..100 of triangle, flattened</
               a>
%e A063987 Mod the 5-th prime, 11, the quadratic rseidues are 1,3,4,5,9 and the 
               non-residues are 2,6,7,8,10.
%e A063987 1; 1; 1,4; 1,2,4; 1,3,4,5,9; ...
%p A063987 with(numtheory): for n from 1 to 20 do for j from 1 to ithprime(n)-1 
               do if legendre(j, ithprime(n)) = 1 then printf(`%d,`,j) fi; od: od:
%Y A063987 Cf. A063988.
%Y A063987 Sequence in context: A127812 A100353 A080508 this_sequence A010126 A021712 
               A014571
%Y A063987 Adjacent sequences: A063984 A063985 A063986 this_sequence A063988 A063989 
               A063990
%K A063987 nonn,tabf,nice,easy
%O A063987 1,4
%A A063987 Suggested by Gary W. Adamson, Sep 18 2001
%E A063987 More terms from James A. Sellers (sellersj(AT)math.psu.edu), Sep 25 2001

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