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A119974 Embed zeros in A119972, thereby creating a signed triangular matrix illustrating the pattern of negative values.

%I A119974 #16 Dec 27 2021 11:28:15
%S A119974 1,2,-3,4,0,5,0,-6,0,-7,8,0,0,0,9,0,0,10,0,0,-11,0,-12,0,0,0,0,13,0,0,
%T A119974 0,-14,0,0,0,-15,16,0,0,0,0,0,0,0,17,0,0,0,0,18,0,0,0,0,-19,0,0,20,0,
%U A119974 0,0,0,0,0,0,21,0,0,0,0,0,-22,0,0,0,0,0,-23,0,-24,0,0,0,0,0,0,0,0,0,0,25
%N A119974 Embed zeros in A119972, thereby creating a signed triangular matrix illustrating the pattern of negative values.
%H A119974 Hakan Icoz, <a href="/A119974/b119974.txt">Table of n, a(n) for n = 1..1326</a> (rows 1..51).
%e A119974 Triangle begins
%e A119974    1;
%e A119974    2,  -3;
%e A119974    4,   0,   5;
%e A119974    0,  -6,   0,  -7;
%e A119974    8,   0,   0,   0,   9;
%e A119974    0,   0,  10,   0,   0, -11;
%e A119974    0, -12,   0,   0,   0,   0,  13;
%e A119974    0,   0,   0, -14,   0,   0,   0, -15;
%e A119974   16,   0,   0,   0,   0,   0,   0,   0,  17;
%e A119974    0,   0,   0,   0,  18,   0,   0,   0,   0, -19;
%e A119974    0,   0,  20,   0,   0,   0,   0,   0,   0,   0,  21;
%e A119974    0,   0,   0,   0,   0, -22,   0,   0,   0,   0,   0, -23;
%e A119974    0, -24,   0,   0,   0,   0,   0,   0,   0,   0,   0,   0,  25;
%e A119974   ...
%Y A119974 Cf. A119972.
%K A119974 sign,tabl
%O A119974 1,2
%A A119974 _Alford Arnold_, Jun 06 2006
%E A119974 More terms from _Hakan Icoz_, Dec 25 2021