OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (3, -2, -2, 2).
FORMULA
a(0)=1, a(1)=3, a(2)=7, a(3)=13, a(n)=3*a(n-1)-2*a(n-2)- 2*a(n-3)+ 2*a(n-4) From Harvey P. Dale, May 27 2012
MATHEMATICA
CoefficientList[Series[(1-x)^(-1)/(1-2 x+2 x^3), {x, 0, 40}], x] (* or *) LinearRecurrence[{3, -2, -2, 2}, {1, 3, 7, 13}, 40] (* Harvey P. Dale, May 27 2012 *)
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Nov 17 2002
STATUS
approved