2,1
G.f.: [3+3x+2x^2]/[(1-x)(1-x-x^2-x^3)].
Equals A089068(n+2) - 3.
Sequence in context: A037048 A139142 A037257 this_sequence A011796 A073801 A065891
Adjacent sequences: A027111 A027112 A027113 this_sequence A027115 A027116 A027117
nonn
Clark Kimberling (ck6(AT)evansville.edu)
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