2,1

G.f.: x^2(x^4-4x^3+6x^2-4x+2)/[(1-2x)(1-x)^3].

Sequence in context: A016059 A027556 A120414 this_sequence A072827 A002529 A018027

Adjacent sequences: A054133 A054134 A054135 this_sequence A054137 A054138 A054139

nonn

Clark Kimberling (ck6(AT)evansville.edu)