%I #5 Dec 16 2018 23:48:19
%S 1,1,1,-2,-1,1,6,2,-3,1,-22,-6,10,-5,1,90,22,-38,22,-7,1,-394,-90,158,
%T -98,38,-9,1,1806,394,-698,450,-194,58,-11,1,-8558,-1806,3218,-2126,
%U 978,-334,82,-13,1,41586,8558,-15310,10286,-4942,1838,-526,110,-15,1,-206098,-41586,74614,-50746,25150,-9922,3142,-778,142
%N Riordan array ((1-x+sqrt(1+6x+x^2))/2, (sqrt(1+6x+x^2)-x-1)/2).
%e Triangle starts
%e 1;
%e 1,1;
%e -2,-1,1;
%e 6,2,-3,1;
%e -22,-6,10,-5,1;
%e 90,22,-38,22,-7,1;
%Y Inverse of triangle A112475. Row sums are A112478.
%K easy,sign,tabl
%O 0,4
%A _Paul Barry_, Sep 07 2005
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