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Floor-Sqrt transform of large central Delannoy numbers (A001850).
0

%I #4 Mar 30 2012 18:55:30

%S 1,1,3,7,17,41,94,220,515,1209,2845,6711,15861,37549,89015,211287,

%T 502051,1194083,2842413,6771220,16141369,38501639,91888052,219411132,

%U 524154756,1252695124,2995034616,7163349548,17138661276,41017945745,98196952422,235147807457,563242204233

%N Floor-Sqrt transform of large central Delannoy numbers (A001850).

%F a(n) = floor(sqrt(centralDelannoy(n))).

%t FSFromSeries[f_,x_,n_] := Map[Floor[Sqrt[#]]&,CoefficientList[Series[f,{x,0,n}],x]]

%t FSFromSeries[1/Sqrt[1-6x+x^2],x,100]

%K nonn

%O 0,3

%A _Emanuele Munarini_, Jul 07 2011