OFFSET
0,4
FORMULA
G.f f: f(z)=(1+z+z^2+2*z^3+6*z^4+((2*z^5)/(1-z))+((2*z)^5/(4*(1-2*z))))
a(n) = A052548(n-2), n>3 . - R. J. Mathar, Feb 29 2016
EXAMPLE
a(5)=2^3+2=10. a(6)=2^4+2=18.
MAPLE
taylor(((1+z^3+4*z^4-4*z^5)/(1-z))+((8*z^5)/(1-2*z)), z=0, 50); v(0):=1:v(1):=1:v(2):=1:v(3):=2:v(4):=6: for n from 5 to 50 do v(n):=2^(n-2)+2:od:seq(v(n), n=0..50);
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Richard Choulet, Mar 15 2010
STATUS
approved