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A181645 Triangle Id-(xc(x),xc(x)), c(x) the g.f. of the Catalan numbers A000108. 2

%I #2 Mar 30 2012 18:59:28

%S 1,-1,1,-1,-1,1,-2,-2,-1,1,-5,-5,-3,-1,1,-14,-14,-9,-4,-1,1,-42,-42,

%T -28,-14,-5,-1,1,-132,-132,-90,-48,-20,-6,-1,1,-429,-429,-297,-165,

%U -75,-27,-7,-1,1,-1430,-1430,-1001,-572,-275,-110,-35,-8,-1,1,-4862,-4862,-3432

%N Triangle Id-(xc(x),xc(x)), c(x) the g.f. of the Catalan numbers A000108.

%C Inverse is A181644, the eigentriangle of the Catalan triangle (c(x),xc(x)), A033184.

%e Triangle begins

%e 1,

%e -1, 1,

%e -1, -1, 1,

%e -2, -2, -1, 1,

%e -5, -5, -3, -1, 1,

%e -14, -14, -9, -4, -1, 1,

%e -42, -42, -28, -14, -5, -1, 1,

%e -132, -132, -90, -48, -20, -6, -1, 1,

%e -429, -429, -297, -165, -75, -27, -7, -1, 1

%K easy,sign,tabl

%O 0,7

%A _Paul Barry_, Nov 03 2010

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)