A192674 Floor-Sqrt transform of large central Delannoy numbers (A001850).

1, 1, 3, 7, 17, 41, 94, 220, 515, 1209, 2845, 6711, 15861, 37549, 89015, 211287, 502051, 1194083, 2842413, 6771220, 16141369, 38501639, 91888052, 219411132, 524154756, 1252695124, 2995034616, 7163349548, 17138661276, 41017945745, 98196952422, 235147807457, 563242204233

Offset: 0

Author

Emanuele Munarini, Jul 07 2011

Keywords

• nonn

Programs

Mathematica

FSFromSeries[f_,x_,n_] := Map[Floor[Sqrt[#]]&,CoefficientList[Series[f,{x,0,n}],x]]
FSFromSeries[1/Sqrt[1-6x+x^2],x,100]

Formula

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