OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (2, 0, 0, 0, -1).
FORMULA
a(1)=1, a(2)=2, a(3)=3, a(4)=4, a(5)=8, a(n)=2*a(n-1)-a(n-5). - Harvey P. Dale, May 23 2011
G.f.: -x*(2*x^3+x^2-1) / ((x-1)*(x^4+x^3+x^2+x-1)). - Colin Barker, Aug 07 2013
MATHEMATICA
Accumulate[LinearRecurrence[{1, 1, 1, 1}, {1, 1, 1, 1}, 50]] (* or *) LinearRecurrence[ {2, 0, 0, 0, -1}, {1, 2, 3, 4, 8}, 50] (* Harvey P. Dale, May 23 2011 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Harvey P. Dale, May 23 2011
STATUS
approved