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) = 18*(-5+3*2^(1+n)-2*n) = 18*A050488(n+1).
a(n) = 4*a(n-1)-5*a(n-2)+2*a(n-3) for n>2.
G.f.: -18*(x+1) / ((x-1)^2*(2*x-1)).
(End)
Sequence in context: A063788 A066854 A247901 * A117735 A041624 A227812
Adjacent sequences: A059135 A059136 A059137 * A059139 A059140 A059141
easy,nonn,more
Jonas Wallgren, Jan 19 2001
approved