0,2

a(n) = 2*a(n - 1) + 3*a(n - 2) - 2*a(n - 3)

a(0) = 1, a(1) = 3, a(2) = 9, a(3) = 25

Cf. A101399, A101400.

Pairwise sums of A046672.

Sequence in context: A097861 A058719 A046661 this_sequence A101168 A079857 A101499

Adjacent sequences: A101194 A101195 A101196 this_sequence A101198 A101199 A101200

easy,nonn

J. F. J. Laros (jlaros(AT)liacs.nl), Jan 22 2005