OFFSET
1,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..1000
Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,1,-1).
FORMULA
From Chai Wah Wu, May 29 2016: (Start)
a(n) = a(n-1) + a(n-5) - a(n-6).
G.f.: x^2*(x^4 + x^3 + 4*x^2 + x + 1)/(x^6 - x^5 - x + 1). (End)
MATHEMATICA
Select[Range[0, 100], MemberQ[{0, 1, 2, 6, 7}, Mod[#, 8]]&] (* Harvey P. Dale, Jul 27 2011 *)
LinearRecurrence[{1, 0, 0, 0, 1, -1}, {0, 1, 2, 6, 7, 8}, 50] (* G. C. Greubel, May 29 2016 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved