0,2

Gf(x) = 1/((1-x)*(1-2*x)*(1-3*x)^2)

a(n) = 8*2^n+(9/2*n+9/2)*3^n-45/4*3^n-1/4

a(n) = 9*a(n-1)-29*a(n-2)+39*a(n-3)-18*a(n-4)

Equals the fourth right hand column of A163940.

A163942 is another right hand column.

Sequence in context: A126477 A152580 A120665 this_sequence A159598 A156544 A094793

Adjacent sequences: A163938 A163939 A163940 this_sequence A163942 A163943 A163944

easy,nonn

Johannes W. Meijer (meijgia(AT)hotmail.com), Aug 13 2009