0,1
Table of n, a(n) for n=0..14.
J. Wallgren, Hierarchical sequences
Conjectures from Colin Barker, Oct 07 2015: (Start)
a(n) = 2*(-5+7*2^n)-3*n.
a(n) = 4*a(n-1)-5*a(n-2)+2*a(n-3) for n>2.
G.f.: (x-4) / ((x-1)^2*(2*x-1)).
(End)
Sequence in context: A053698 A162867 A336971 * A031164 A116600 A074033
Adjacent sequences: A059137 A059138 A059139 * A059141 A059142 A059143
easy,nonn,more
Jonas Wallgren, Jan 19 2001
approved
