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Riordan array ((1-x+sqrt(1-6x+x^2))/2, (1+x-sqrt(1-6x+x^2))/4).
1

%I #5 Dec 29 2023 12:54:15

%S 1,-2,1,-2,-1,1,-6,-1,0,1,-22,-3,1,1,1,-90,-11,4,4,2,1,-394,-45,17,16,

%T 8,3,1,-1806,-197,76,69,34,13,4,1,-8558,-903,353,313,153,59,19,5,1,

%U -41586,-4279,1688,1472,716,278,92,26,6,1,-206098,-20793,8257,7112,3448,1346,454,134,34

%N Riordan array ((1-x+sqrt(1-6x+x^2))/2, (1+x-sqrt(1-6x+x^2))/4).

%C First column is A085403. Row sums are A086456. Inverse of A117352.

%e Triangle begins

%e 1,

%e -2, 1,

%e -2, -1, 1,

%e -6, -1, 0, 1,

%e -22, -3, 1, 1, 1,

%e -90, -11, 4, 4, 2, 1,

%e -394, -45, 17, 16, 8, 3, 1

%K easy,sign,tabl

%O 0,2

%A _Paul Barry_, Mar 09 2006