2,2

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

Pairwise sums of A027053.

Adjacent sequences: A027021 A027022 A027023 this_sequence A027025 A027026 A027027

Sequence in context: A023541 A079989 A062480 this_sequence A055328 A027962 A023537

nonn

Clark Kimberling (ck6(AT)evansville.edu)