OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (1, 1, 1, 1).
FORMULA
a(0)=1, a(1)=3, a(2)=7, a(3)=11, a(n)=a(n-1)+a(n-2)+a(n-3)+a(n-4) [From Harvey P. Dale, Apr 18 2012]
MATHEMATICA
CoefficientList[Series[(1+2x+3x^2)/(1-x-x^2-x^3-x^4), {x, 0, 30}], x] (* or *) LinearRecurrence[{1, 1, 1, 1}, {1, 3, 7, 11}, 30] (* Harvey P. Dale, Apr 18 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved