OFFSET
0,3
COMMENTS
The above sequence also satisfies a(n)-6 a(n-1)+8 a(n-2)=4*3^{n-2} (n >= 3) with a(0)= a(1)=1.
FORMULA
a(n)=7*2^(n-1)+3*2^(2*n-1)-4*3^n. G.f.: -(1-8*x+19*x^2)/((3*x-1)*(2*x-1)*(4*x-1)) [From R. J. Mathar, Jul 13 2009]
CROSSREFS
KEYWORD
nonn
AUTHOR
Tian-Xiao He (the(AT)iwu.edu), Jul 11 2009
EXTENSIONS
More terms from Vincenzo Librandi and R. J. Mathar, Jul 13 2009
STATUS
approved