OFFSET
0,1
LINKS
Index entries for linear recurrences with constant coefficients, signature (2, 0, -1, 1).
FORMULA
a(n)=2*a(n-1)-a(n-3)+a(n-4); 4 initial terms required.
MATHEMATICA
LinearRecurrence[{2 , 0, -1, 1}, {2, 3, 4, 7}, 40] (* Harvey P. Dale, May 02 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved